Koh Chang is located in Ranong Province and is famous for its rainy season, which lasts from April to November.
The tourist season lasts from November to April.
The average air temperature is 25-30C/77-86F.
The average water temperature is 28C/82F.
The visibility is different at each dive site, and is around 5-30m/16-98ft.
Currents are mild (1 knot).
What to see
Divers can admire staghorn corals and table corals that form the most pristine reef in Thailand. They can also observe marine species such as triggerfish, moray eels, barracudas, mackerel, stingrays, angelfish, turtles, and sometimes whale sharks.