Similan Islands, Thailand
    Phuket Environmental Protected Area

    Koh Doc 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 - Koh Doc 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

    Koh Doc Mai, or Flower Island, stands as a prominent limestone outcrop between Phuket and the Similans. We often hit it when transiting, and it rarely disappoints. The walls drop away dramatically on three sides, absolutely plastered with colourful soft corals that live up to the island's name. It's a fantastic place for poking into cracks and crevices; we regularly spot moray eels, octopus, and the occasional ornate ghost pipefish tucked away. The site suits divers who enjoy a slower pace, keen to scour every inch of the wall for macro life, though we've certainly seen leopard sharks resting on the sandy bottom too. We'd suggest going early to avoid the crowds from day boats.

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

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    Conditions

    Ocean conditions, forecast and tides for Koh Doc Mai

    Koh Doc Mai Ocean Conditions

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

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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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