Andaman Sea (Phuket)
The Andaman Sea has a variety of dive sites where you can see some fantastic marine and wildlife such as corals, eels and sharks. These islands are easily accessible from mainland Thailand.

• Hun Daeng
  soft corals, manta rays, whale sharks
• Hin Mouang
  Home to Thailand’s highest wall of soft corals (depth 60m). Different types of anemone, sea fans, colourful coral life. Spot reef sharks and leopard sharks.

• Koh Dok Mai
  One of the best wall dives. Stretches 25m. Wide variety of soft corals, many different types of fish and abundance of eels & leopard sharks.

• Hin Bida
  Great for divers and snorkelers. Beautiful reef views. Corals, snapper, cuttlefish, zebra sharks, box fish, puffer fish, whale sharks.

• Koh Phi Phi
  Great Wall Dive. Soft corals, sponges (in different shapes and colours), moray eels, wrasse, scorpionfish, leopard sharks, reef sharks, glassfish.

• Richelieu Rock
  Prime location for whale shark sighting and diving. Huge granite pinnacle. Home to a variety of soft corals, sponges, sea fans, anemones. Groupers, rays, barracudas. (diving here is exclusively from October to May), whale shark sightings commonly happen around Feb, March, April.

Koh Tao
Koh Tao remains a popular choice among tourists who would like to explore what Thailand has to offer in the underwater world and complete their Open Water Diver Certification. Koh Tao, which means “Turtle Island”, is blessed with white sandy beaches and crystal-clear blue seas. The island offers a range of restaurants and nightlife options in Mae Haad and Sairee Beach to choose from when you are not in your wetsuit. This island features the famous dive site, Chumphon Pinnacles, that welcomes you with anemone fish and colourful coral life.

• Koh Nang Yuan
  Shallow Water; Reef Fish
• Chumphon Pinnacles
  Most famous & beautiful. Anemones, Western Clownfish, Grouper, Batfish, Barracuda, schools of Jacks, Whale Shark, leopard sharks, lionfish, rabbitfish and bannerfish
• Ao Leuk
  Shallow dive; calm diving. Variety of reef fish (angelfish, butterflyfish, barracuda) turtles.

• HTMS Sattakut
  Best shipwreck in Koh Tao, Deep dive; Giant Groupers, Snappers, Butterflyfish, Sweetlips, etc.

Similan Islands
The Similan Islands consist of 11 islands and have over 20 dive sites to offer. The Thai government declared it as a national park in 1982 and is committed to preserve its stunning ecosystems.  It is also well-known for its liveaboard diving trips.

• West of Eden
  One of the best for shallow dives. Incredible coral structures. View of acropora table corals, gorgonian sea fans, glassfish, goatfish, turtles, batfish, pipefish, cowries.

• Elephant Head Rock
  Also known as Hin Pusa. Amazing complex of large boulders, creating a maze of tunnels and caverns divers can swim through. Deep dive (50m). Whitetip reef sharks, leopard sharks, purple fire gobies, dwarf, wrasse, jawfish, cuttlefish, mantis shrimp.

• Christmas Point
  Great for drift dive. Reef sharks, napoleon wrasses, barracudas, frogfish, ribbon eels, sea fans.

Koh Tachai
This island is part of the Similan Island National Park. It is famous for its intricate swim-throughs and channels. You can expect to see a wild variety of fish, leopard sharks and oceanic triggerfish.

• Twin Peaks
  Coral, tropical fish, leopard sharks, nurse sharks, hawksbill turtle, manta rays.

• Southern Rock
  Excellent for deeper diving in stronger currents. Spot fish.

Surin Islands
This is a more remote choice for those who would like to venture off the mainstream route among tourists. You will be rewarded with pristine coral reefs and a chance to see some whale sharks.

• Hin Rap
  Pelagic fish, turtles
• Koh Chi
  Shallow dive. Blanketed by hard corals. Stronger currents. Turtles, Pelagic fish (barracuda & tuna), soldierfish, angelfish, reef sharks.
• Koh Torinla
  Eastern coast. Low tide. Staghorn corals, porites corals, cardinalfish, humpnose big-eye bream, snappers. Depths 10 – 25m

• Koh Khrok
  Drift dive.Hard and soft coral reefs. (Staghorn, brain, mushroom. coral table), Hawksbill turtle, pufferfish, parrotfish, wrasse. Shallow waters; good for snorkeling.
• Koh Sak
  White sandy beach and calm water. Coral reef. Pipefish, dragon fish, sea horse.
• Koh Larn
  The largest of the 3 islands off Pattaya. Coral structure (stretches down up to 25m). Nurse sharks.

Koh Chang
A one-hour flight from Bangkok followed by a ferry takes you to Koh Chang, an island with dive sites suitable for divers with all levels of experience. This site features HTMS Chang, one of the largest and newest shipwrecks that was sunk in 2012 and located only four miles away from the island.

• HTMS Chang
  Thailand’s longest shipwreck. Variety of fishes and barracuda.
• Hin Luk Bat
  Shoaling fish, moray eels, rays, parrotfish, angelfish, banner dish, barracuda, dolphins. Max dive depth 25m.
• Koh Rang
  Multilevel diving site. Up to 30m. Trigger fish, turtles, batfish, groupers, barracuda. Not much coral.
• Hin Kuak Ma
  Shallow dives. Max out at 16m. Stone fish, eels, angelfish, stingrays, coral, bamboo shark or turtles.