Ganh Dau covers the northern reef area of Phu Quoc in the Gulf of Thailand, with seven sites including Turtle Island, Nudibranch Garden, and Hon Bang. All sites suit beginner divers, and the depth range stays shallow throughout, topping out at fifteen metres. The site mix spans reef, drift, and muck, giving divers the chance to search for nudibranchs, seahorses, broadclub cuttlefish, hairy frogfish, and leaf scorpionfish alongside more typical reef residents such as bluespotted fantail ray and sixband parrotfish. Water temperatures are warm all year and approach their peak in late spring.
Monthly water temperature across Ganh Dau's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
The dry season from November to April delivers the best visibility and most settled surface conditions in this part of the Gulf of Thailand. During the wet season the southwest monsoon can reduce visibility and make some sites less accessible. Because all sites are shallow, the warm year-round water temperatures mean minimal exposure protection is needed.
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Water temperature around Ganh Dau ranges from about 28°C in January to 31°C in April, based on satellite sea-temperature data for its dive sites.
With water around 28–31°C, a rash guard or 3mm shorty works in Ganh Dau year-round.
Fin maps 7 sites in Ganh Dau (6 scuba diving sites).
Across Ganh Dau's dive sites, January, February, March, April, November and December are most often reported as the best months to visit.
3 more sites to explore
