Similan Islands, Thailand
    Mu ko Lanta

    Purple Rock

    Best months: Jan–May

    Protected Area

    Mu ko Lanta

    Why dive here

    With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Purple Rock 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

    Purple Rock, up in the northern Similans, is exactly what it sounds like: a big rock, often with a purple hue from the resident soft corals. It's an exposed site, so expect some current, which helps bring in schools of fusiliers and trevally. Look closely among the rocks for nudibranchs and flatworms. This site is best for experienced divers comfortable in stronger currents.

    Today06:1218:1212h 0m daylightGolden hour 17:44

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    Conditions

    Ocean conditions, forecast and tides for Purple Rock

    Purple Rock Ocean Conditions

    Monthly averages for Purple Rock, 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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