Three Islets
Why dive here
With 164+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Three Islets offers some of Mergui Archipelago's richest diving. Water ranges 28-31°C, warmest April, May, June.
Three Islets in the Mergui offers a bit of everything, making it a solid choice for a day’s diving. The main draw is a sizable cave system, where we often spot nurse sharks tucked away in the shadows; if you’re lucky, a grey reef shark might cruise past the entrance. For those who prefer a slower pace, the north-east side has a gentler current and is a good spot for searching out smaller critters like ghost pipefish and seahorses. We’ve also seen plenty of fantail rays here, blending into the sandy patches, alongside healthy numbers of reef fish. It’s a good all-rounder, enjoyable for most experience levels.
Reviews for Three Islets
Conditions
Ocean conditions, forecast and tides for Three Islets
Three Islets Ocean Conditions
Monthly averages for Three Islets, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (9.78, 97.85) (1km away)
October Averages
Sea Temperature
29°C
85°F · Range: 28–30.5°C
Current Speed
5.39 cm/s
Direction: S (201.8°)
Salinity
29.12 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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