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Discover the best dive sites from Koh Samui and Koh Tao. Sail Rock, Pinnacles and reefs in the Gulf of Thailand.
Koh Samui is perfectly located in the Gulf of Thailand, giving divers access to some of the most famous and diverse dive sites in Thailand. From vibrant coral reefs to world-class pinnacles, the region offers unforgettable underwater experiences for certified divers and students alike.
At Discovery Divers, we dive regularly around Koh Samui, Koh Tao, and Koh Phangan, choosing sites based on conditions, experience levels, and marine life activity to ensure the best possible dives.
Planning your first trip to Koh Samui? Discover our dedicated page to learn more about the island, its beaches, climate, activities, and the best things to do during your stay.
Sail Rock, known as Thailand's most famous dive site, is a granite pinnacle in between Koh Phangan and Koh Tao that rises 15M out of the water.
It is a world class dive site and great for all levels of divers as there is much to see from the surface all the way to the bottom.
Sail rock is home to the famous “chimney” which is a vertical swim-through where you can enter at 18M and exit at 12M or 7M into the sunlight and beautiful pink anemones.
Sail Rock is basically a wall dive covered with tons of soft coral and anemones. There are huge schools of marine life here including trevally, barracuda, great barracuda, king mackerels, tuna, fusileers, giant groupers, giant moray eels, batfish, angelfish, butterfly fish, scorpion fish, and always a chance for the visiting whale shark.
For the advanced diver there are a series of submerged pinnacles off the main rock that are exciting to explore.
Widely considered one of Thailand's premier dive site, Chumphon Pinnacle is also one of the islands most challenging, with occasionally strong currents. Ranging from depths of 14m to 36m, the site is a group of massive rocks arranged in a rough oval and running north to south.
Visibility is superb in season, and the site plays host to a wide variety of pelagic as well as reef fish. Great barracuda, king mackerel, grouper, and tuna throng to Chumphon year round. Also see huge schools of batfish, trevally, fusileers. This site is also great for seeing some of the smaller stuff such as banded shrimp, boxfish, and white eyed moray eels. As you go shallower there are huge fields of anemones which will blow your mind. Whale shark sightings are common here as well as keep you eyes open in the shallow water for the occasional groups of beluga whales.
As the site is a fair distance offshore, visitors from the open ocean are unpredictable and sailfish, oceanic white tip sharks and bull sharks have been spotted.
Mango Bay is a beautiful protected bay on the north side of Koh Tao which is perfect for beginning divers and experienced divers looking for a nice relaxing dive. There are beautiful rock formations and stunning hard corals in which can be seen large schools of fusiliers, barracuda, groupers, triggerfish, angelfish and butterfly fish. Also in you look close in the sand you can see seahorses and gobies.
Twins or Twin Peaks is one of the most popular sites on Koh Tao due to its diversity and that it's able to be enjoyed by beginning divers as well as experienced ones. There are two sets of pinnacles with the first set a maximum of 10 meters and the deeper set a maximum of 18 meters. There are many divers fish that make their home here including blue spotted sting rays, moray eels, pufferfish, angelfish, groupers, wrasse, the ornery triggerfish and cute gobies in the sand. Also the famous clown fish circle is here where a family of nemos make their home inside a circle of rocks, a must see on this dive. Twins is also home to buoyancy world, which is a group of man made sculptures that is great for putting to the test your buoyancy skills.
White Rock is a very diverse site made up of two big granite boulders with a bunch of smaller ones surrounding them. The maximum depth here is about 25M, but with the layout of the rocks you can have great dives at the shallower depths so this site is great for both open water and advanced divers. Here you can see stingrays, moray eels, yellowtail barracuda, turtles, butterfly fish, angelfish and some triggers to keep you alert.
Green rock consists of a bunch of boulder formations that create an impressive collection of swimthroughs which is great to practice your buoyancy skills. It is a very diverse site with beautiful diving from 8M to 28M. Here you can see eels, batfish, groupers, angelfish, pipefish and turtles. Also keep your eyes open in the sand a round the rocks for titan and yellow margin triggerfish which many whom make their home and nests here.
Appropriately named for its resemblance to a sharks dorsal fin, this is one of Koh Tao's treasures. Each side of the island is its own dive site, with one side packed with a huge variety of hard corals and sponges, making this a popular home for turtles. The other side boasts a breathtaking soft coral garden with frequent sightings of stingrays, moray eels and titan triggerfish. Currents at this site can be stronger than usual for this area which makes this the perfect opportunity for a drift dive.
Japanese Gardens is a protected bay on the beautiful island of Koh Nanguyan. The site can be accessed form the beach or the boat and can be dove a number of different ways. The site is good for beginners as well as advanced divers Known for stunning hard coral and many swim throughs. The gardens is home to yellowtail barracuda, chevron barracuda, triggerfish as well as much other diverse marine life.
The team at Discovery Divers is like a big family that welcomes you immediately. They are warm and friendly and care about your experience being the best possible. The equipment was good, the food was delicious and the coral and marine life were some of the best I have seen anywhere in the world.
Been on this service today with the team and it has been BRILLIANT!... Would definitely recommend to anyone looking to do scuba diving or snorkeling as we've both had the best day today with you guys on the boat and the rest of the team and boat team
We had a great time with Discovery Dive Centre. From the email contact, pick up from the hotel, equipment to the dive team it was all great. It was all easy and very professional. Thanks to that the dive was very relaxing and enjoyable despite not so great visibility. Highly recommended!
