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THAILAND: KOH SAMUI 
The Best Dive Sites in Koh Samui

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The Best Dive Sites in Koh Samui

The best dive sites in Koh Samui offer marvelous underwater scenery, teeming with a wide range of fish and corals. You'd be hard-pressed to find better sites within a short distance of each other. Visibility is generally excellent year-round. On your dive excursions, you'll also come across exotic marine animals like whale sharks, giant groupers, scribbled filefish, and yellowtails.

Diving is an attractive and rewarding holiday experience in the Gulf of Thailand. Many people head to picturesque Koh Tao to learn diving, but there are plenty of other underwater sites to discover as well. 

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Koh Tao

Koh Tao (Turtle Island) lies 70 km north of Koh Samui. There are numerous dive sites in and around the island, which is a mini-tropical paradise offering jungle walks and white sandy beaches.

Here, the water visibility ranges from 15-30 meters. It includes popular dive spots like Chumporn and Southwest Pinnacles, Nang Yuan, Green Rock, White Rock, and Red Rock. The waters around Koh Tao are home to an abundant range of marine life, including barracuda, tuna, snapper and sea turtles.

Chumporn Pinnacles

Chumporn Pinnacles is one of the most challenging dive sites in Koh Samui. It occasionally has strong currents and depths of 10-35 meters. True to its name, this dive site indeed consists of fascinating submerged pinnacles.

The highest of these rocks is approximately 16 meters below the surface. Chumporn allows you to swim with man-sized groupers and other large pelagic fish, including schools of barracuda, tuna and mackerel.

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Green Rock

Green Rock is a dive site in Koh Samui that provides a good selection of swim-through opportunities in depths of 4-25 meters. The rock consists of large archways, caverns, caves and crevices.

Common sightings include harlequin sweetlips, blue-ringed angelfish and moray eels. It's possible to spot whitetip reef sharks when diving in Green Rock. Large groupers, schools of yellowtail, and blue and yellow fusiliers can be found further out in deeper water.

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Hin Wong

Hin Wong is a large and varied site east of Koh Tao, with depths ranging from 10-30 meters. Unfortunately, the only shortcoming of the site is the unpredictable water visibility, which cannot be assured at all times.

Nevertheless, the site abounds with delicate sea fans and spiraling wire coral. It's also home to many types of fish, including groupers, filefish, and snapper. If you are lucky and keep your distance, you may even see turtles feeding around the reef system.

Samran Pinnacles

Samran Pinnacles is a dive site that tends to attract advanced divers in Koh Samui. Here, the water is deeper and currents are much stronger than most sites in the Gulf of Thailand. The rocks are submerged in 12 meters of water and attract large schools of jackfish (bigger varieties), trevally, and giant barracudas.

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Southwest Pinnacles

Southwest Pinnacles consist of 3 rock formations that range from 4-30 meters below the surface, representing a series of short wall dives. At the top of the pinnacles are blankets of underwater plant life in an array of colours.

Between the rocks, you can see many bushy black coral sea whips and gorgonian sea fans. Leopard sharks are often spotted in the Southwest Pinnacles, and it's even possible to meet a whale shark. Most of the time, the dive site has groupers, scribbled filefish, masked porcupine fish, yellowtail, barracuda, and snapper.

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White Rock

White Rock is a Koh Samui dive site that explores 2 submerged pinnacles, only 2 meters above the surface but extends between 18-22 meters underwater. Schools of butterflyfish and angelfish dominate the area. 

Colonies of staghorn corals attract breams and damsels to make their homes in White Rock. On any given dive, look out for sea snakes, turtles, morays and blue spotted stingrays. It's possible to encounter White Rock's resident titan triggerfish, which are territorial by nature.

Sail Rock

Sail Rock is an internationally renowned dive site north of Koh Samui, between Koh Tao and Koh Phangan. Although only 15 meters above the water, the structure extends 40 meters below the surface. Its main attraction is a naturally formed, 15-metre high underwater dive wall (or chimney). Divers can ascend from 18 meters up the chimney wall to the surface, making this a unique diving experience. 

Visibility at Sail Rock is usually excellent, at around 30 meters. The chimney has small holes housing white-eyed and yellow margin moray eels and sea anemones. Sightings of reef sharks and manta rays are also common, as are large schools of tuna, jacks, trevally and barracudas. It's possible to encounter whale sharks if you're diving in Sail Rock during the winter months.

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Koh Wao and Koh Yippon

Koh Wao and Koh Yippon are the most popular dive sites in the Ang Thong National Marine Park. Both offer incredible swim-through experiences, not to mention encounters with caves, tunnels and passageways. Water visibility is around 15-25 meters. 

Ang Thong National Marine Park lies approximately 30 km northwest of Samu, it is a pristine archipelago of 42 islands in the Gulf of Thailand and offers some of the best diving in Thailand.

Above the waves, the islands feature towering limestone mountains, thick jungle, white-sand beaches, fertile mangroves, waterfalls, and hidden coves and lakes to explore. The best time to visit this marine park is between September and January.

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