Chumphon dive sites comprise coral reefs, small islands, and wrecks. All are home to an array of vibrant marine life, including whale sharks, turtles, and an abundance of tropical fish. Chumphon marine park is extensive but only sees a fraction of the underwater visitors compared to other popular locations for SCUBA diving in Thailand.


With over 40 separate islands and thousands of species of marine life, dive sites within Chumphon Marine Park have long been embraced by the local Thai diving community. Now becoming more popular with the broader SCUBA diving community, Chumphon dive sites are waiting to be explored by both new and experienced divers on PADI courses and fun diving trips


Far from a secondary diving destination, SCUBA diving in Chumphon is as good as diving on Koh Tao - only without the hordes of other scuba divers. The reefs are spectacular, and each dive site has its own distinct characteristics. So if you’ve been diving on Koh Tao and enjoyed it, Chumphon dive sites will not disappoint.

Koh Ngam Yai dive site 

Best Times: February - October

Koh Ngam Yai is the larger of two island formations located just 17 kilometres off the coast of Chumphon. The underwater landscape consists of limestone with sparse vegetation amidst the natural, almost artistic, rock structures. Truly one of the best Chumphon dive sites, Koh Ngam Yai is popular with both SCUBA divers and snorkellers and is considered one of the most famous spots in the Gulf of Thailand for both activities. The colourful corals are home to many fish species, and the mild currents and exceptional visibility make it a firm favourite for Sensui Dive Resort customers.

Hin Chedi dive site 

Best Times: February - October

This dive site off the southernmost tip of Ko Ngam Yai is named after the magnificent rock pinnacles which protrude from the surface there. Originating from Sanskrit, a Chedi is a mound-like or hemispherical structure made popular by Buddhist architecture. The natural formation of these bulbous rocks gives this Chumphon dive site its name. Underwater, the terrain is characterised by loose boulder formations, healthy corals, and abundant anemone fields. Brightly coloured tropical fish and passing turtles provide plenty for divers to see.

Hin Pae dive site 

Best Times: February - October

Hin Pae is located north of Koh Ngam Yai and is a unique dive site formed by an assembly of rocks that barely protrude the surface. The main point of interest is provided by the wreck of a Thai shipping vessel that sunk in a storm a few years ago. Since sinking, the ship has been slowly disassembling, with various parts finding new homes scattered across the reef. The maximum depth is 24m, but 10-15m is usually the optimum depth. Hin Pae is abundant in sea anemones, black corals, sea whips, giant clams, butterflyfish, barracuda, stingrays, turtles, and even whale sharks are spotted occasionally.

Koh Ngam Noi dive site 

Best Times: February - October

Koh Ngam Noi lies 400 meters south of Koh Ngam Yai. It is only a third of the size of its sister island but very alike in its beauty. The best diving spot is at the southern tip, where there is a naturally formed swim-trough. Most divers stay close to the rocks as this is one of the best Chumphon dive sites to search for different types of nudibranch. Schools of fish include snappers, jackfish, and yellowtail barracuda, and blue-spotted stingrays can often be spotted on the sand.

HTMS Prab Wreck dive site

Best Times: February - October

The vessel was commissioned in 1944 and was originally designed by the US Navy for Pacific island-hopping campaigns in World War II. In time, it was handed to the Thai Navy and used as a training vessel before being decommissioned. The ship was donated to Chumphon Province in 2011 for use as an artificial reef, and is now considered one of Chumphon’s best dive sites. The HTMS Prab lies at a shallow depth giving PADI Open Water divers easy access. A variety of marine life can be spotted, including large schools of one-spot snapper, fusiliers, and even the occasional hawksbill turtle or whale shark.