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Diving Guide > Thailand > Koh Surin (Koh Surin National Marine Park), Kon Bon, Koh Tachai & Richelieu Rock , Thailand Scuba Diving Guide


Koh Surin dive map

Detail map

Koh Surin photo


Thailand Koh Surin Bird eye dive map

All these islands lie in the north of Koh Similan Marine National Park. These islands offer world class diving that are very different from those in Similan islands. To know more about diving in Koh Similan National Marine Park, please visit our Koh Similan's diving guide.


Big fish actions are the norm here, in fact sightings of these big fishes are so common here that some of them are though to be residents of these water.

Islands in Koh Surin National Marine Park are also famous for their beautiful coves, bays and dense jungle. Most divers would have packed their diving itinerary to the maximum. So spending some time to enjoy the scenaries of these island in a boat or yacht would be a most welcome break.

Dive Sites around Koh Surin


  • Wall at Kon Bon
    This island is just 20 km north of Koh Similan National Marine Park. The wall is on the west coast of Koh Bon and offers divers an almost verticle wall dive. Water depth range from 30 to 45 meters. Leopard sharks can be found in the sandy flats below the wall and swiming on the ridge. The soft coral here, though not as dense as those in Similan islands, are radically different. Shade of blue, yellow and turquoise are on displays. Toward the end of the diving season (April and May) manta ray will visit this site to feed in its plankton rich water.

  • Reef of Koh Tachai
    Koh Tachai is about 25 km north of Koh Bon. Many considered this to be the best diving site in Thailand. Not only does this site have beautiful corals but that are many large fish here. There are leopard sharks, nurse sharks and eagle rays. Hawksbill turtle and whale sharks are regular visitors of these water. Koh Tachai also has beautiful sandy beach on it norheast shore line for divers to take a breather from divings.

  • Koh Chi (Koh Surin National Marine Park)
    Koh Chi island sits on the northeast Koh Surin National Marine Park. This is one of the better place to observe large visiting pelagics such as Great Barracuda, Dogtooth Tuna and Threadfin Trevally. This is also a good place to observe turtles on their way to and from Koh Surin Nau.

  • Turtle Ledge(Koh Surin National Marine Park)
    This diving site is found in the south of Koh Surin Tai it is named for frequent sighting of Hawksbill turtles. These beautiful creatures can sometime be seen feeding on the soft corals here. The site is also visited by many snappers and sweetlips. There are clusters of Stag and Elkhorn Corals and Giant clams in some areas.

  • Mai Ngam (Koh Surin National Marine Park)
    Situated in the west coast of Koh Surin Nua, this is a very interesting site because Green and Hawksbill turtle passby this site to go ashore to lay eggs. The highly endangered Leatherback turtle has recently been sighted here and this could only be good news to all marine lovers.

  • Richelieu Rock
    Richelieu Rock is situated 14 km on the east of Koh Surin National Marine Park. These rocks are completely submerged in the water and therefore are a big hazzard for boats without GPS navigation capabilities. These rocks seems to be a Whale Sharks magnet. Some have argued the site is a nursery for Whale Sharks in order to explain the frequent sightings. The site also features many Gorgonian Sea Fans, Scorpionfish, stonefish, moray eels, shrimps, crabs and nudibranchs among its many residents. Large palegics visitors also frequent this site, you can observe Rainbow runners, Barracudas, Tuna and jacks. One of the more interesting residents here must be the Guitarfish, with a half-shark and half-ray body, they rest on the seabed. Observant divers will also have chance to encounter the Tiger Tail Sea Horses, they make great photography subjects.

Manta Ray

Giant Clam

Leatherback Turtle

Guitar Fish

Best Time to Div in Koh Surin


The best time to visit Koh Surin is during the dry season which starts from October to May, however diving is possible year round.

Where to Stay in Koh Surin



Before the Tsunami hit the shores of Southern Thailand, the best place to stay for travellers visiting Similan islands is Khao Lak. Currently, most of Khao Lak hotels and Khao Lak itself are under-going extensive repair and rebuilding projects. So travellers might want to consider staying in Phuket, where the damage is much lesser. Divers can stay in Phuket and make liveaboard trips to Similan islands. Please visit our Phuket's Scuba Diving Guide for more information in of divings and accomodations in Phuket. Check back with our website to see if Khao Lak hotels are available soon.

Khao Lak is one of Thailand newest and fastest growing tourist destination. It has the advantage of being Surin islands. Divers setting off from Khao Lak will be able to reach Surin islands within 3 hours of boat ride. Thus day trips to Surin island are only possible here.

We have more than 5 hotels offering you rooms with great discount.

For Last Minute Reservation (Lowest Rate Guarantee)

See a complete listing of Khao Lak Hotels and Accommodations

How to Get to Koh Surin


The nearest airport to Khao Lak is Phuket International airport. The Khao Lak is an hour drive from the airport and cabs or taxis are easily available to bring to your hotels in Khao Lak. The cost of the journey is about 1400 bahts.

There are direct flights to Phuket International Airport from Singapore, Bangkok, Hong Kong, Kuala Lumpur and Osaka. Major airlines offering daily flights to Phuket include

How to Get to Koh Surin


The nearest airport to Khao Lak is Phuket International airport. The Khao Lak is an hour drive from the airport and cabs or taxis are easily available to bring to your hotels in Khao Lak. The cost of the journey is about 1400 bahts.

There are direct flights to Phuket International Airport from Singapore, Bangkok, Hong Kong, Kuala Lumpur and Osaka. Major airlines offering daily flights to Phuket include

Other Interesting Dive Sites





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