Similan Islands, Thailand
    Phuket Environmental Protected Area

    Ko Dok Mai

    Best months: Jan–May

    Protected Area

    Phuket Environmental Protected Area

    Why dive here

    With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Ko Dok Mai offers some of Similan Islands's richest diving. Water ranges 29-31°C, warmest April, May, June.

    Best timeJan–May
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBlacktip Reef Sharks, Eagle Rays, Giant Moray Eels, Whale Sharks and Clownfish · 173+ species recorded
    Water29-31°C · warmest April, May, June
    StandoutExceptional marine biodiversity

    Ko Dok Mai, or "Flower Island," is more of a limestone pinnacle than an island, and we find ourselves drawn back to it repeatedly in the Similans. It’s got a real wall-diving vibe, dropping straight down into the depths. The eastern side is typically where we begin, drifting along the wall that’s just riddled with crevices and small caves. These little nooks are where the real magic happens, a perfect hideout for shy critters. Keep an eye out for octopus – not always a guaranteed sighting, but when you spot a Dollfus's octopus tucked away, it’s a tiny victory. The western side, while less dramatic, has its own charm. Here, we often find ourselves captivated by the sheer volume of tropical silversides and blackstriped cardinalfish, shimmering like a liquid curtain. It's a great spot for macro enthusiasts; we've spent entire dives just peering into the smaller cracks, finding blue-spot blennies and even a well-camouflaged freckled anglerfish if you’re patient enough. Currents here can pick up, especially around the northern and southern tips, so be prepared for a bit of a workout. We’d suggest going early in the morning for the calmest conditions and best light. Overall, Ko Dok Mai offers a rich tapestry of wall life, perfect for those who love to explore every crack and crevice rather than just zooming along.

    Today06:1418:1311h 59m daylightGolden hour 17:45

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    Conditions

    Ocean conditions, forecast and tides for Ko Dok Mai

    Ko Dok Mai Ocean Conditions

    Monthly averages for Ko Dok Mai, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (8.1, 98.3) (6km away)

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    October Averages

    Sea Temperature

    30°C

    85°F · Range: 28.7–30.4°C

    Current Speed

    5.1 cm/s

    Direction: S (191.3°)

    Salinity

    29.75 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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