{"id":7532,"date":"2026-03-11T12:58:11","date_gmt":"2026-03-11T11:58:11","guid":{"rendered":"https:\/\/mybestplacestovisit.com\/?page_id=7532"},"modified":"2026-03-19T08:41:40","modified_gmt":"2026-03-19T07:41:40","slug":"diving-in-thailand","status":"publish","type":"page","link":"https:\/\/mybestplacestovisit.com\/ja\/asia\/thailand\/diving-in-thailand","title":{"rendered":"Diving in Thailand: Complete Guide to the Andaman Sea and Koh Tao (2026)"},"content":{"rendered":"\n<div class=\"wp-block-uagb-container uagb-block-e953bf12 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-51c39afc\"><h1 class=\"uagb-heading-text\">Diving in Thailand: Complete Guide to the Andaman Sea and Koh Tao (2026)<\/h1><\/div>\n<\/div><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>Diving in Thailand is among the best scuba experiences in Southeast Asia, offering warm tropical waters, vibrant coral reefs, dramatic underwater topography, and encounters ranging from colorful reef life to whale sharks and manta rays. Whether you choose the world-famous Similan Islands in the Andaman Sea or the accessible dive sites of Koh Tao in the Gulf of Thailand, the country delivers exceptional diving for all levels.<\/p>\n\n\n\n<p>Based on my own dives across Thailand \u2014 including a North Andaman liveaboard in March 2026 and dives at Sail Rock in 2025 \u2014 this guide covers where to dive, what you can see, the best seasons, and how to choose between Thailand\u2019s two main diving regions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-andaman-sea-vs-gulf-of-thailand-quick-comparison\">Andaman Sea vs Gulf of Thailand \u2014 Quick Comparison<\/h2>\n\n\n\n<p>Choosing between Thailand\u2019s two main diving regions depends on your experience level, travel dates, and the type of underwater encounters you\u2019re seeking.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udc0b <strong>Best for big animals:<\/strong> Andaman Sea (Similan Islands, Koh Bon, Richelieu Rock)<\/li>\n\n\n\n<li>\ud83e\udd3f <strong>Best for beginners and courses:<\/strong> Koh Tao (Gulf of Thailand)<\/li>\n\n\n\n<li>\ud83d\udc41\ufe0f <strong>Best visibility:<\/strong> Similan Islands (Andaman Sea)<\/li>\n\n\n\n<li>\ud83d\udcc5 <strong>Most consistent year-round diving:<\/strong> Gulf of Thailand<\/li>\n\n\n\n<li>\ud83d\udea2 <strong>Best liveaboard experiences:<\/strong> Andaman Sea<\/li>\n<\/ul>\n\n\n\n<p>In short, the Andaman Sea delivers Thailand\u2019s most spectacular and remote diving, while the Gulf of Thailand offers accessible, affordable, and beginner-friendly conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-andaman-sea-diving-west-coast\">Andaman Sea Diving (West Coast)<\/h2>\n\n\n\n<p>The <strong>Andaman Sea<\/strong> offers Thailand\u2019s most spectacular diving. Located west of the mainland, this region includes the Similan Islands, Surin Islands, Koh Bon, Koh Tachai, and the legendary Richelieu Rock.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why dive the Andaman Sea?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Thailand\u2019s best visibility and reef health<\/li>\n\n\n\n<li>Large pelagic species (manta rays, whale sharks)<\/li>\n\n\n\n<li>Dramatic underwater landscapes<\/li>\n\n\n\n<li>Massive schools of fish<\/li>\n\n\n\n<li>World-class liveaboard routes<\/li>\n<\/ul>\n\n\n\n<p>Most top sites lie far offshore and are best explored via liveaboard from Phuket or Khao Lak.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/andaman-sea-similan-island-9-donald-duck-bay.jpeg\" alt=\"andaman sea similan island 9 donald duck bay\" class=\"wp-image-7569\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/andaman-sea-similan-island-9-donald-duck-bay.jpeg 1024w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/andaman-sea-similan-island-9-donald-duck-bay-300x169.jpeg 300w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/andaman-sea-similan-island-9-donald-duck-bay-768x432.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Similan islands<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Similan Islands \u2014 Granite Cathedrals Underwater<\/h3>\n\n\n\n<p>The Similan Islands National Park is Thailand\u2019s most famous dive destination. Massive granite boulders form swim-throughs, arches, and underwater labyrinths covered in corals and marine life.<\/p>\n\n\n\n<p>Typical encounters include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reef sharks<\/li>\n\n\n\n<li>Sea turtles<\/li>\n\n\n\n<li>Giant trevally<\/li>\n\n\n\n<li>Barracuda schools<\/li>\n\n\n\n<li>Moray eels<\/li>\n\n\n\n<li>Macro life hidden among corals<\/li>\n<\/ul>\n\n\n\n<p>Conditions are usually calm with excellent visibility, making the Similans suitable for intermediate divers.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Diving the Similan Islands \ud83c\uddf9\ud83c\udded | Swim-Through Arch at Island #9 | Andaman Sea\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/vt_8jXiiqm0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Koh Bon \u2014 Manta Ray Territory<\/h3>\n\n\n\n<p>Koh Bon lies north of the Similans and features steep walls and deep drop-offs. It is one of Thailand\u2019s best locations for manta rays, especially at cleaning stations along the ridge.<\/p>\n\n\n\n<p>Even without mantas, the site offers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Large pelagic fish<\/li>\n\n\n\n<li>Reef sharks<\/li>\n\n\n\n<li>Dense reef life<\/li>\n\n\n\n<li>Deep-water species<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"578\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Koh-Bon-dive-site-Blaise-Semilan-islands-Andaman-sea.jpeg\" alt=\"Koh Bon dive site Blaise Semilan islands Andaman sea\" class=\"wp-image-7604\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Koh-Bon-dive-site-Blaise-Semilan-islands-Andaman-sea.jpeg 1024w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Koh-Bon-dive-site-Blaise-Semilan-islands-Andaman-sea-300x169.jpeg 300w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Koh-Bon-dive-site-Blaise-Semilan-islands-Andaman-sea-768x434.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Koh Bon<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Koh Tachai \u2014 Big Fish Action<\/h3>\n\n\n\n<p>Tachai Pinnacle is a submerged seamount rising from deep water, famous for strong currents and spectacular fish density.<\/p>\n\n\n\n<p>Highlights include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Huge barracuda schools<\/li>\n\n\n\n<li>Giant trevally hunting in the blue<\/li>\n\n\n\n<li>Surgeonfish tornadoes<\/li>\n\n\n\n<li>Occasional manta rays or whale sharks<\/li>\n<\/ul>\n\n\n\n<p>This site can be challenging due to currents, but it is unforgettable when conditions align.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"578\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Tachai-dive-site-Andaman-sea-Thailand.jpeg\" alt=\"\" class=\"wp-image-7609\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Tachai-dive-site-Andaman-sea-Thailand.jpeg 1024w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Tachai-dive-site-Andaman-sea-Thailand-300x169.jpeg 300w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Tachai-dive-site-Andaman-sea-Thailand-768x434.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Richelieu Rock \u2014 Thailand\u2019s Best Dive Site<\/h3>\n\n\n\n<p>Richelieu Rock is widely considered the top dive site in Thailand and one of the best in Southeast Asia.<\/p>\n\n\n\n<p>This horseshoe-shaped pinnacle explodes with life:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dense schools of fusiliers and snappers<\/li>\n\n\n\n<li>Predatory fish activity<\/li>\n\n\n\n<li>Exceptional macro life<\/li>\n\n\n\n<li>Soft corals in vivid colors<\/li>\n\n\n\n<li>Frequent whale shark sightings (seasonal)<\/li>\n<\/ul>\n\n\n\n<p>Every dive here feels like entering a living aquarium.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"578\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Richelieu-diving-Andaman-sea-Thailand.jpeg\" alt=\"Richelieu diving Andaman sea Thailand\" class=\"wp-image-7610\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Richelieu-diving-Andaman-sea-Thailand.jpeg 1024w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Richelieu-diving-Andaman-sea-Thailand-300x169.jpeg 300w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Richelieu-diving-Andaman-sea-Thailand-768x434.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Richelieu<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-gulf-of-thailand-diving-koh-tao-and-surroundings-east-coast\">Gulf of Thailand Diving \u2014 Koh Tao and Surroundings (East Coast)<\/h2>\n\n\n\n<p>On the opposite side of the country, the Gulf of Thailand offers a completely different diving experience.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why dive Koh Tao?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Excellent for beginners and training<\/li>\n\n\n\n<li>Affordable courses and fun dives<\/li>\n\n\n\n<li>Easy shore access<\/li>\n\n\n\n<li>Year-round diving<\/li>\n\n\n\n<li>High chance of turtle encounters<\/li>\n<\/ul>\n\n\n\n<p>Koh Tao is one of the world\u2019s most popular places to earn an Open Water certification.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Chumphon Pinnacle \u2014 Koh Tao\u2019s Signature Site<\/h3>\n\n\n\n<p>Located northwest of Koh Tao, Chumphon Pinnacle is a submerged granite formation attracting large schools of pelagic fish.<\/p>\n\n\n\n<p>Common sightings:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Barracuda schools<\/li>\n\n\n\n<li>Trevally<\/li>\n\n\n\n<li>Batfish<\/li>\n\n\n\n<li>Reef sharks<\/li>\n\n\n\n<li>Occasional whale sharks<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Sail Rock \u2014 The Gulf\u2019s Best Dive Site<\/h3>\n\n\n\n<p>Situated between Koh Tao and Koh Phangan, Sail Rock is considered the best dive site in the Gulf of Thailand.<\/p>\n\n\n\n<p>Its famous vertical \u201cchimney\u201d swim-through is a highlight, along with:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dense fish aggregations<\/li>\n\n\n\n<li>Predator activity<\/li>\n\n\n\n<li>Seasonal whale shark visits<\/li>\n\n\n\n<li>Excellent visibility during peak months<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"576\" height=\"1024\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2025\/04\/Sail-Rock-Koh-Samui-576x1024.jpg\" alt=\"Sail Rock Koh Samui\" class=\"wp-image-3881\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2025\/04\/Sail-Rock-Koh-Samui-576x1024.jpg 576w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2025\/04\/Sail-Rock-Koh-Samui-169x300.jpg 169w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2025\/04\/Sail-Rock-Koh-Samui-768x1365.jpg 768w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2025\/04\/Sail-Rock-Koh-Samui-864x1536.jpg 864w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2025\/04\/Sail-Rock-Koh-Samui.jpg 1024w\" sizes=\"auto, (max-width: 576px) 100vw, 576px\" \/><figcaption class=\"wp-element-caption\">Sail Rock<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Marine Life in Thailand<\/h2>\n\n\n\n<p>Thailand\u2019s tropical waters support a remarkable diversity of species.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Large marine animals<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Whale sharks (seasonal)<\/li>\n\n\n\n<li>Manta rays (Andaman Sea)<\/li>\n\n\n\n<li>Reef sharks<\/li>\n\n\n\n<li>Sea turtles<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Reef fish &#038; schooling species<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Barracuda<\/li>\n\n\n\n<li>Trevally<\/li>\n\n\n\n<li>Snapper<\/li>\n\n\n\n<li>Fusiliers<\/li>\n\n\n\n<li>Batfish<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Macro highlights<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Seahorses<\/li>\n\n\n\n<li>Nudibranchs<\/li>\n\n\n\n<li>Ghost pipefish<\/li>\n\n\n\n<li>Shrimp and crabs<\/li>\n\n\n\n<li>Frogfish<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Ghost-pipefish-Andaman-sea-diving-Thailand.jpeg\" alt=\"Ghost pipefish Andaman sea diving Thailand\" class=\"wp-image-7591\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Ghost-pipefish-Andaman-sea-diving-Thailand.jpeg 1024w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Ghost-pipefish-Andaman-sea-diving-Thailand-300x225.jpeg 300w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Ghost-pipefish-Andaman-sea-diving-Thailand-768x576.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Ghost pipefish<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Best Time to Dive in Thailand<\/h2>\n\n\n\n<p>Thailand\u2019s two coasts have opposite monsoon seasons, allowing diving somewhere in the country almost year-round.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Andaman Sea (Similan, Richelieu Rock)<\/h3>\n\n\n\n<p><strong>Best season:<\/strong> November to April<br><strong>Peak conditions:<\/strong> February to April<br><strong>Closed:<\/strong> May to October (marine park protection)<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Gulf of Thailand (Koh Tao)<\/h3>\n\n\n\n<p><strong>Best season:<\/strong> March to September<br><strong>Good conditions:<\/strong> Most of the year<br><strong>Worst months:<\/strong> November\u2013December monsoon<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Nam-Chai-Bay-Andaman-sea-Thailand.jpeg\" alt=\"Nam Chai Bay Andaman sea Thailand\" class=\"wp-image-7593\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Nam-Chai-Bay-Andaman-sea-Thailand.jpeg 1024w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Nam-Chai-Bay-Andaman-sea-Thailand-300x169.jpeg 300w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Nam-Chai-Bay-Andaman-sea-Thailand-768x432.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Liveaboard vs Day Trips<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Liveaboard (Andaman Sea)<\/h3>\n\n\n\n<p>Best for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Access to remote offshore sites<\/li>\n\n\n\n<li>Multiple dives per day<\/li>\n\n\n\n<li>Big-fish encounters<\/li>\n\n\n\n<li>Serious divers<\/li>\n<\/ul>\n\n\n\n<p>Typical trips last 4\u20137 days.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Land-Based Diving (Koh Tao, Phuket)<\/h3>\n\n\n\n<p>Best for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Beginners and courses<\/li>\n\n\n\n<li>Flexible schedules<\/li>\n\n\n\n<li>Budget travel<\/li>\n\n\n\n<li>Casual diving<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/liveboard-sunset-similan-islands-thailand.jpg\" alt=\"liveboard sunset similan islands thailand\" class=\"wp-image-7592\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/liveboard-sunset-similan-islands-thailand.jpg 768w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/liveboard-sunset-similan-islands-thailand-225x300.jpg 225w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption class=\"wp-element-caption\">Sunset aboard a liveaboard<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-where-to-base-yourself-for-diving-in-thailand\">Where to Base Yourself for Diving in Thailand<\/h2>\n\n\n\n<p>Your choice of base depends on which coast you plan to explore, as Thailand\u2019s top dive regions lie on opposite sides of the country.<\/p>\n\n\n\n<p><strong>Andaman Sea (West Coast)<\/strong><br>The main gateways are <strong>Phuket<\/strong> and <strong>Khao Lak<\/strong>, both offering easy access to the Similan Islands, Koh Bon, Koh Tachai, and Richelieu Rock.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83c\udfdd\ufe0f <strong><a href=\"https:\/\/mybestplacestovisit.com\/asia\/thailand\/phuket\/\">Phuket<\/a>:<\/strong> Largest hub with international airport, wide range of accommodation, day trips, and liveaboards departing from nearby Thap Lamu Pier<\/li>\n\n\n\n<li>\ud83c\udf3f <strong>Khao Lak:<\/strong> Quieter alternative closer to the Similan Islands, popular with divers joining liveaboards<\/li>\n<\/ul>\n\n\n\n<p><strong>Gulf of Thailand (East Coast)<\/strong><br>Diving here centers around <strong>Koh Tao<\/strong>, reached via Koh Samui or the mainland.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udc22 <strong>Koh Tao:<\/strong> Thailand\u2019s top base for beginner-friendly diving, training courses, and affordable fun dives<\/li>\n\n\n\n<li>\u2708\ufe0f <strong><a href=\"https:\/\/mybestplacestovisit.com\/asia\/thailand\/koh-samui\/\">Koh Samui<\/a>:<\/strong> Major transport hub with an airport, offering easier access before transferring to Koh Tao<\/li>\n<\/ul>\n\n\n\n<p>Choosing the right base ensures shorter travel times to dive sites and a smoother overall diving itinerary.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Who Should Dive Where?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Choose the Andaman Sea if you want:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Thailand\u2019s best overall diving<\/li>\n\n\n\n<li>Pelagic encounters<\/li>\n\n\n\n<li>Dramatic underwater scenery<\/li>\n\n\n\n<li>Liveaboard experience<\/li>\n\n\n\n<li>Advanced or intermediate dives<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Choose Koh Tao if you want:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Easy, affordable diving<\/li>\n\n\n\n<li>Training courses<\/li>\n\n\n\n<li>Calm conditions<\/li>\n\n\n\n<li>Turtle encounters<\/li>\n\n\n\n<li>Social island atmosphere<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"578\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Blaise-at-Richelieu-dive-site-Andaman-sea-Thailand.jpeg\" alt=\"Blaise at Richelieu dive site Andaman sea Thailand\" class=\"wp-image-7611\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Blaise-at-Richelieu-dive-site-Andaman-sea-Thailand.jpeg 1024w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Blaise-at-Richelieu-dive-site-Andaman-sea-Thailand-300x169.jpeg 300w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Blaise-at-Richelieu-dive-site-Andaman-sea-Thailand-768x434.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Richelieu, Andaman sea<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Is Thailand Good for Diving in 2026?<\/h2>\n\n\n\n<p>Absolutely. Thailand remains one of the world\u2019s most accessible and rewarding tropical dive destinations. With protected marine parks, strong dive infrastructure, and diverse ecosystems, it offers exceptional value compared to many global hotspots.<\/p>\n\n\n\n<p>For many divers, Thailand is the perfect introduction to tropical diving \u2014 and for others, the Andaman Sea provides experiences rivaling top destinations worldwide.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/diving-Andaman-Sea-Thailand-sea-fan.jpeg\" alt=\"diving Andaman Sea Thailand sea fan\" class=\"wp-image-7590\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/diving-Andaman-Sea-Thailand-sea-fan.jpeg 1024w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/diving-Andaman-Sea-Thailand-sea-fan-300x169.jpeg 300w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/diving-Andaman-Sea-Thailand-sea-fan-768x432.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Final Thoughts<\/h2>\n\n\n\n<p>Thailand offers two distinct diving worlds:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The remote, spectacular Andaman Sea<\/li>\n\n\n\n<li>The accessible, beginner-friendly Gulf of Thailand<\/li>\n<\/ul>\n\n\n\n<p>Together, they make the country one of the most versatile dive destinations on Earth.<\/p>\n\n\n\n<p>Whether you are chasing whale sharks at Richelieu Rock, drifting through granite cathedrals in the Similan Islands, or spotting turtles around Koh Tao, diving in Thailand delivers unforgettable underwater experiences.<\/p>\n\n\n\n<p>If you\u2019re planning a broader journey, explore my <strong><a href=\"https:\/\/mybestplacestovisit.com\/asia\/thailand\/\">complete Thailand Travel Guide<\/a><\/strong> to design an itinerary that combines temples, tropical islands, national parks, and world-class diving across both coasts.<\/p>\n\n\n\n<p>If you\u2019re comparing destinations across Southeast Asia, you may also enjoy my selection of the <strong><a href=\"https:\/\/mybestplacestovisit.com\/asia\/top-10-best-dive-sites-in-south-east-asia\/\">Top Dive Sites in South East Asia<\/a><\/strong>, where Thailand stands alongside global heavyweights thanks to Richelieu Rock and the Similan Islands.<\/p>\n\n\n\n<p>Thailand is not just a single dive destination \u2014 it\u2019s two distinct underwater worlds shaped by different seas, seasons, and ecosystems. From beginner-friendly reefs to remote pelagic hotspots, it offers a complete diving journey in one country.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/mybestplacestovisit.com\/asia\/thailand\/diving-in-thailand\/north-andaman-liveaboard-diving\/\"><img loading=\"lazy\" decoding=\"async\" width=\"370\" height=\"440\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Richelieu-dive-site-Andaman-sea-Thailand.jpeg\" alt=\"Richelieu dive site Andaman sea Thailand\" class=\"wp-image-7597\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Richelieu-dive-site-Andaman-sea-Thailand.jpeg 370w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Richelieu-dive-site-Andaman-sea-Thailand-252x300.jpeg 252w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-north-andaman-sea-liveaboard-world-class-diving\">\ud83d\udea2 North Andaman Sea Liveaboard \u2014 World-Class Diving<\/h3>\n\n\n\n<p>Explore Thailand\u2019s most spectacular dive sites \u2014 Similan Islands, Koh Bon, and Richelieu Rock \u2014 on a multi-day cruise far from the mainland.<\/p>\n\n\n\n<p><strong>\ud83d\udc49 <a href=\"https:\/\/mybestplacestovisit.com\/asia\/thailand\/diving-in-thailand\/north-andaman-liveaboard-diving\/\">Read more: North Andaman Dive Cruise<\/a><\/strong><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/mybestplacestovisit.com\/asia\/thailand\/phuket\/\"><img loading=\"lazy\" decoding=\"async\" width=\"370\" height=\"440\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Black-Rock-Cliff-Phuket-Thailand.jpg\" alt=\"Black Rock Cliff Phuket Thailand\" class=\"wp-image-7598\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Black-Rock-Cliff-Phuket-Thailand.jpg 370w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Black-Rock-Cliff-Phuket-Thailand-252x300.jpg 252w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-phuket-gateway-to-thailand-s-best-diving\">\ud83c\udfdd\ufe0f Phuket\u2014 Gateway to Thailand\u2019s Best Diving<\/h3>\n\n\n\n<p>Most dive trips to the Andaman Sea depart from Phuket, making it the ideal base for liveaboards, day trips, and travel planning.<\/p>\n\n\n\n<p>\ud83d\udc49 <a href=\"https:\/\/mybestplacestovisit.com\/asia\/thailand\/phuket\/\"><strong>Read more: Phuket Travel Guide<\/strong><\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"370\" height=\"440\" src=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Blaise-Richelieu-rock-Andaman-sea-Thailand.jpeg\" alt=\"Blaise Richelieu rock Andaman sea Thailand\" class=\"wp-image-7623\" srcset=\"https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Blaise-Richelieu-rock-Andaman-sea-Thailand.jpeg 370w, https:\/\/mybestplacestovisit.com\/wp-content\/uploads\/2026\/03\/Blaise-Richelieu-rock-Andaman-sea-Thailand-252x300.jpeg 252w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-southeast-asia-among-the-world-s-top-dive-regions\">\ud83c\udf0f Southeast Asia \u2014 Among the World\u2019s Top Dive Regions<\/h3>\n\n\n\n<p>Thailand\u2019s reefs rank among Southeast Asia\u2019s finest, alongside legendary destinations across the Coral Triangle.<\/p>\n\n\n\n<p>\ud83d\udc49 <a href=\"https:\/\/mybestplacestovisit.com\/asia\/top-10-best-dive-sites-in-south-east-asia\/\"><strong>Read more: Top 10 Dive Sites in Southeast Asia<\/strong><\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions-diving-in-thailand\">\ud83c\uddf9\ud83c\udded Frequently Asked Questions \u2014 Diving in Thailand<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1773896379326\"><strong class=\"schema-faq-question\">Is Thailand good for scuba diving?<\/strong> <p class=\"schema-faq-answer\">Yes. Thailand is one of the best diving destinations in Southeast Asia, offering warm water year-round, excellent visibility, diverse marine life, and sites suitable for all experience levels.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896406567\"><strong class=\"schema-faq-question\">Where is the best diving in Thailand?<\/strong> <p class=\"schema-faq-answer\">The Andaman Sea (west coast) hosts the country\u2019s top sites, including the Similan Islands, Richelieu Rock, Koh Bon, and Koh Tachai. The Gulf of Thailand (east coast), especially Koh Tao, is known for easier conditions and beginner-friendly diving.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896427884\"><strong class=\"schema-faq-question\"><strong>When is the best time to dive in Thailand?<\/strong><\/strong> <p class=\"schema-faq-answer\">The best season in the Andaman Sea runs from November to April, with peak conditions from January to March. In the Gulf of Thailand, diving is possible most of the year, with best visibility typically from May to September.<br><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896445251\"><strong class=\"schema-faq-question\"><strong>Can beginners dive in Thailand?<\/strong><\/strong> <p class=\"schema-faq-answer\">Absolutely. Thailand is one of the world\u2019s most popular places to learn scuba diving, thanks to calm conditions, warm water, and many professional dive schools.<br><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896461650\"><strong class=\"schema-faq-question\"><strong>Do you need Advanced certification for the Similan Islands?<\/strong><\/strong> <p class=\"schema-faq-answer\">Not always, but it is recommended. Some sites involve depth and currents, making Advanced Open Water certification beneficial for safety and enjoyment.<br><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896478856\"><strong class=\"schema-faq-question\"><strong>What marine life can you see while diving in Thailand?<\/strong><\/strong> <p class=\"schema-faq-answer\">Divers commonly encounter reef sharks, turtles, barracuda, moray eels, octopus, and vibrant reef fish. In the Andaman Sea, sightings of manta rays and whale sharks are possible, though never guaranteed.<br><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896495301\"><strong class=\"schema-faq-question\"><strong>Is liveaboard diving worth it in Thailand?<\/strong><\/strong> <p class=\"schema-faq-answer\">Yes. Liveaboards allow access to remote offshore sites that cannot be reached on day trips and offer multiple dives per day, including early-morning and night dives.<br><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896511818\"><strong class=\"schema-faq-question\"><strong>How warm is the water in Thailand?<\/strong><\/strong> <p class=\"schema-faq-answer\">Water temperatures typically range from 27\u00b0C to 30\u00b0C (81\u201386\u00b0F), so most divers use a thin wetsuit or shorty.<br><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896530767\"><strong class=\"schema-faq-question\"><strong>Are currents strong in Thailand?<\/strong><\/strong> <p class=\"schema-faq-answer\">Conditions vary by site. Many locations have mild currents, but offshore pinnacles in the Andaman Sea can experience stronger flow, attracting larger pelagic species.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773896552284\"><strong class=\"schema-faq-question\"><strong>Is Thailand safe for scuba diving?<\/strong><\/strong> <p class=\"schema-faq-answer\">Yes, provided you dive with reputable operators and follow standard safety guidelines. Thailand has a well-developed diving industry with experienced professionals and modern equipment.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Diving in Thailand: Complete Guide to the Andaman Sea and Koh Tao (2026) Diving in Thailand is among the best  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":314,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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