An Thoi occupies the southern tip of Phu Quoc island in the Gulf of Thailand, and its archipelago holds eight dive sites ranging from very shallow reef to walls dropping to thirty-five metres. Site types span natural reef, drift, wall, and artificial reef, so the area works for beginners at places like North Pineapple Point and Fingernail Island as well as advanced divers tackling the strong currents at South Pineapple Point. Water temperatures are warm throughout the year and peak in the warmer months around late spring. Species recorded here include whale shark, silvertip shark, hairy frogfish, bluespotted fantail ray, seamoth, and leaf scorpionfish, with Buom Island designated as a marine protected area.
Monthly water temperature across An Thoi'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 brings the clearest water and calmest surface conditions, making it the preferred time to dive here. During the southwest monsoon from May onwards, visibility can drop and surface conditions deteriorate, limiting access to some sites. Water temperatures stay warm across all months, so exposure protection is minimal for most visitors.
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Water temperature around An Thoi ranges from about 28°C in January to 31°C in May, based on satellite sea-temperature data for its dive sites.
With water around 28–31°C, a rash guard or 3mm shorty works in An Thoi year-round.
Fin maps 8 sites in An Thoi (7 scuba diving sites and 2 snorkelling spots, with some suited to both).
Across An Thoi's dive sites, January, February, March, April, November and December are most often reported as the best months to visit.
1 more site to explore
