21m
    Beginner
    Similan Islands, Thailand
    Krabi Environmental Protected Area

    Bida Nok Deep Site

    Best months: Jan–May

    Protected Area

    Krabi 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 - Bida Nok Deep Site 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
    Charactermax 21m
    StandoutExceptional marine biodiversity

    Bida Nok Deep Site is a gentle introduction to the Similan experience. It’s a good spot if you’re still getting comfortable with your buoyancy or haven't dived in a while. We often see giant trevally cruise through the deeper sections, and there are always plenty of yellowback fusiliers weaving around the bommies. Keep an eye out for leopard sharks resting on the sandy bottom if you're lucky. It's a solid, easy dive, perfect for a relaxed afternoon.

    Typical Bida Nok Deep Site Dive Profile

    10m20mSafety Stop0m21m max~30 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Safety Notes

    Depth of 21m - Advanced Open Water certification recommended.

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today06:1318:1211h 59m daylightGolden hour 17:44

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    Conditions

    Ocean conditions, forecast and tides for Bida Nok Deep Site

    Bida Nok Deep Site Ocean Conditions

    Monthly averages for Bida Nok Deep Site, 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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