Thailand is a dream tropical paradise destination for vacationers from all over the world. Its pristine beaches, crystal-clear waters, and exotic marine life have made it a popular scuba diving destination worldwide. 

From the Andaman Sea to the Gulf of Thailand, the country is home to some of the most breathtaking dive sites in the world. From exploring colourful coral reefs teeming with marine life to diving with whale sharks and manta rays, Thailand offers an unforgettable underwater experience.

In this article, we will detail all the best scuba diving sites in Thailand you must add to your bucket list to get the most out of the underwater kingdom.

There are many scuba diving sites in Thailand across the Similan Islands, between Koh Lanta and Phuket, in Pattaya, or the islands around Koh Chang. 

Diving in Thailand ranges from fringing reefs, deep drop-offs, wrecks, walls, and caverns to tunnels, pinnacles and open ocean seamounts. It is a great country to take your scuba diving to the next level.

Check out some of the best places for scuba diving in Thailand.

1. Pattaya

Scuba diving in Pattaya, Thailand, is an experience unlike any other for diving enthusiasts. Its crystal-clear waters and diverse marine life make it a haven for some of the world's most unique diving spots. 

With over 15 scuba diving places in Pattaya alone, you can explore awe-inspiring wreck dives and swim among a vibrant array of colourful fishes, sea turtles and large oceanic creatures. The coral reefs in Pattaya are also a sight to behold, as they come in various sizes and shapes. 

• Popular Diving Spots: Samaesan, South Point – Koh Larn, HTMS Mataporn Shipwreck, Koh Krock, Submarine Reef Koh Sak, Koh Klung Badan Bay, Koh Pai, Koh Rin, Breman Shipwreck, Shark Fin Rock, Koh Chan, Koh Sak, Had Nuan.
• Unique Underwater Attractions: Blue spotted rays, eagle rays, bamboo sharks, groupers, scorpionfish, batfish, sweetlips, hawksbill turtles, trevallies, barracudas, blacktip sharks, nurse sharks, tawny sharks, porcelain crabs, whip coral shrimps, seahorse, angelfish.
  
• Depth: 5m - 20m
• Costs: Individual dives – 2,500 THB – 15,000 THB & Courses – 6,500 THB – 20,500 THB 

2. Phuket

Phuket, nestled on Thailand's west coast, holds an underwater kaleidoscope of vibrant coral reefs, intriguing shipwrecks, drop offs, walls, caves, tunnels and diverse marine life. Scuba diving in Phuket caters to all levels of experience. There are dive sites with shallow calm waters and strong currents, where one might encounter pelagic species. 

Phuket also offers unique night dives to witness the nocturnal marine life and florescent plankton in all its glory. The Shark Point Marine Sanctuary is a gem, teeming with leopard sharks, barracudas, and vibrant schools of fish. 

• Popular Diving Spots: Kata Beach, Koh Doc Mai, Banana Bay Racha Noi, South Tip, Camera Bay Racha Noi, Bungalow Bay Racha Yai, Harruby Wreck, Nui Beach, Marita’s Rock, Aussie Reef Racha Noi, Mai Thon.
• Unique Underwater Attractions: Manta rays, whale sharks, leopard sharks, tunas, macro-critters, seahorses, ghost pipefish, barracudas, harlequin shrimp.
  
• Depth: 25m - 40m
• Costs: Individual dives – 1,500 THB – 6,000 THB & Courses – 7,000 THB – 15,000 THB

3. Koh Phi Phi

Journey to the hidden wonders of Koh Phi Phi's underwater world through scuba diving. This adventure, often overshadowed by the island's famous fire shows and beach parties, is surprisingly accessible. With a range of beginner-friendly dive sites, you can easily explore stunning coral reefs and swim alongside schools of fish. 

Explore the beauty of coral fans and underwater limestone formations, with crystal clear waters and white sandy beaches above that make Koh Phi Phi a unique and unforgettable scuba diving experience.

• Popular Diving Spots: Bida Nok, Viking Cave, Piley Wall, Kled Gaeow Wreck, Anemone Reef, King Cruiser Wreck, Hin Bida, Koh Sii, Koh Haa, Koh Talu, Koh Yawasam, Palong Wall.
• Unique Underwater Attractions: Whale sharks, seahorses, corals, leopard sharks, blacktip sharks, yellow fusiliers, moray eels, octopi, macro-critters, reef fish, batfish, eagle rays, stingrays, sea snakes, porcupine pufferfish, lionfish, frogfish, soft coral and gorgonian fans.
  
• Depth: 5m - 32m
• Costs: Individual dives – 1,500 THB – 3,100 THB & Courses – 7,000 THB – 15,000 THB

4. Similan Islands

The clear turquoise waters of the Similan Islands make it a great scuba diving spot in Thailand. Excellent visibility and diverse marine life provide every diver with an unforgettable experience. The Similan Islands are in a national park that is open from 15^th October to 15^th May each year.

There are various dive sites in the Similan Islands, ranging from shallow coral gardens to deep rocky pinnacles. The Similan Islands are known for their giant boulders, swim-throughs, and stunning coral formations. Remember that you will be required to pay park fees before scuba diving here. 

• Popular Diving Spots: East of Eden, Elephant Head Rock, North Point, Deep Six, Boulder City, Shark Fin Reef and Christmas Point, Tachai, Richelieu Rock and Koh Bon.
• Unique Underwater Attractions: Rays, whale sharks, reef sharks, leopard sharks, guitarfish, turtles, morays, eels, barracudas, hump head parrotfish, trevallies, hump head wrasses, seahorses, snappers, harlequin shrimp, ghost pipefish, nudibranchs.
  
• Depth: 5m - 40m
• Costs: Individual dives – 1,500 THB – 5,700 THB & Courses – 7,000 THB – 15,000 THB 

5. Koh Tao

Koh Tao is a small island in the Gulf of Thailand known as 'Turtle Island'. Koh Tao is renowned for its crystal-clear and warm waters, impressive coral reefs, stunning scenery and diverse marine life, making it a must-visit destination for scuba diving enthusiasts. 

Koh Tao offers affordable dive courses and certifications, making it a perfect destination for first timers and those looking to improve their skills. Divers can spot whale sharks, rays, barracudas, and colourful tropical fish, making this scuba spot in Thailand every diver's paradise. 

• Popular Diving Spots: Chumphon Pinnacle, Red Rock, Junkyard Reef, Mango Bay, HTMS Sattakut, Tanote Bay, Lighthouse Bay, Sail Rock, Southwest Pinnacle, Aow Mao, Laem Thian, Ban’s Artificial Reef.
• Unique Underwater Attractions: Rock formations, corals, titan triggerfish, sea snake, turtles, whale sharks, macro-critters, nudibranchs, shrimps, blacktip reef sharks, bull sharks, eagle ray, sting ray, barracudas, groupers, pilot whales, dolphins.
  
• Depth: 5m - 40m
• Costs: Individual dives – 1,500 THB – 2,500 THB & Courses – 7,000 THB – 14,000 THB

6. Khao Lak

Khao Lak is a hidden gem for scuba diving enthusiasts, located in the Andaman Sea on the west coast of Thailand. This stunning destination offers a unique underwater experience with impressive coral reefs and a range of dive sites suitable for all levels of experience. The location features granite boulders, soft and hard corals, and schools of colourful fish. 

Divers can try wreck, wall and reef diving in Khao Lak explore the underwater world. Its white sandy beaches, crystal clear waters and dense tropical rainforest offers a remote island vibe with excellent scuba diving. 

• Popular Diving Spots: Koh Bon, Three Trees, Koh Tachai Pinnacle, Bangsak Wreck, Artificial Reef, Hideaway Bay, Khao Na Yak, Boonsung Wreck.
• Unique Underwater Attractions: Shrimp, turtles, reef sharks, basking sharks, whale sharks, rays, leopard sharks, sea snakes, dolphins, octopus, cuttlefish, silvertips, batfish, nudibranchs, snappers, porcupine fish, corals, sea fans.
  
• Depth: 5m - 40m
• Costs: Individual dives – 1,800 THB – 8,900 THB & Courses – 8,500 THB – 25,000 THB

May through September are the best time to scuba dive in East Thailand (Gulf of Thailand). October through April is the best time to visit the West Coast of Thailand for optimal scuba diving experiences.

The country experiences a tropical climate, making scuba diving in Thailand possible all year round! Whale sharks appear between March and June, while manta rays are spotted from mid-October through mid-May.

Even if scuba diving is not your main agenda, you can read about the best time to visit Thailand for a perfect vacation in this tropical paradise.

Before you go scuba diving in Thailand, be sure to carry these essential items:

• Valid ID proof is a must
• Swimwear, dry bag and towels
• Hats, sunglasses and sunblock
• First aid kit

Scuba diving operators in Thailand will also provide you with scuba diving equipment. Be sure to check your equipment before you're in the water to avoid malfunctions. 

• Dive only in designated areas, respect your environment and always pay attention to your instructors' guidelines.
• You are allowed to click pictures underwater, however damaging marine life and attractions can attract major penalties.
• Many scuba diving sites in Thailand are in and around marine parks, hence you will need to cross check the availability and keep cash on you to pay for park entry fees.
• Wait for at least 2 hours after eating before you go scuba diving.
• Avoid diving under the influence of substances or if advised against by a medical practitioner.
• There should be a time gap of at least 24 hours between flying and going scuba diving.

Most importantly, you must not forget to avail of International Travel Insurance to Thailand from India to safeguard your expenses in case of any unforeseen incidents while scuba diving in Thailand. With a comprehensive travel insurance policy, you not only protect your trip and flight-related hurdles, but you can also avail of medical benefits in case of emergencies on your holiday.

If you're looking for an unforgettable scuba diving adventure, Thailand should be at the top of your list. With its stunning underwater landscapes and diverse marine life, Thailand is one of the world's premier scuba diving destinations. You'll find a vast array of dive sites to explore, each with its own unique features and attractions.

Read more:

• 25 Best Places to Visit in Thailand
• What is Thailand Famous For?
• 11 Tourist Scams in Thailand and How to Avoid Them