Koh Mak diving is centered on Koh Rang Marine Park, home to a handful of excellent shallow water dive sites. There are different types of hard, soft corals and rock formations. You can watch moray eels, stingrays, parrotfish, snappers, fusiliers, big grouper, butterfly fish, banner fish, barracudas, angelfish, and sometimes whale sharks. The average water temperature is about 29C all year round and the water visibility is 5-25m.
As Koh Rang sits just to the west of Koh Mak, diesel costs between the islands are low, which in turn enables the two Koh Mak dive shops, Koh Mak Divers and BB Divers to offer cheaper prices to their customers. Getting to and from the dive sites is also very quick, so you can easily enjoy a couple of leisurely dives on the reef and still have most of the afternoon back on the island.
Of course, Koh Rang is not the only option and advanced divers can also head further away south of Koh Chang to explore the HTMS Chang, the largest wreck in Thailand. Price deals are available for multiple days of diving if booked together. Transfers to and from your resort, lunch and all equipment are included in the price.