Similan Islands, Thailand
    Thung Thale

    Koh Ha / Koh Rok Diving Adventures in Thailand

    Best months: Jan–May

    Protected Area

    Thung Thale

    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 Ha / Koh Rok Diving Adventures in Thailand 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 Ha and Koh Rok offer a different vibe compared to the main Similan sites. We usually find fewer day-trippers here, which is always a bonus. The diving often involves exploring some interesting caverns, a real treat for those comfortable with overhead environments. Keep an eye out for turtles drifting by, and then slow right down for the macro life – it’s surprisingly good, often tucked away in crevices. We’d suggest these sites for advanced divers looking for something a bit off the typical Similan circuit.

    Today06:1218:1111h 59m daylightGolden hour 17:44

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    Conditions

    Ocean conditions, forecast and tides for Koh Ha / Koh Rok Diving Adventures in Thailand

    Koh Ha / Koh Rok Diving Adventures in Thailand Ocean Conditions

    Monthly averages for Koh Ha / Koh Rok Diving Adventures in Thailand, 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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