13m
    Beginner
    Similan Islands, Thailand
    Krabi Environmental Protected Area

    Ton Sai Beach

    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 - Ton Sai Beach 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 13m
    StandoutExceptional marine biodiversity

    Ton Sai Beach offers a gentle introduction to the Similans, with a maximum depth of 13m. It’s mostly sand and rubble, dotted with small bommies, making it a good spot for beginners or those getting back in the water. We’ve found pipefish and juvenile reef fish here, along with the occasional cuttlefish. It’s a solid choice for a shallow, easy dive.

    Typical Ton Sai Beach Dive Profile

    5m10m15mSafety Stop0m13m max~50 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

    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 Ton Sai Beach

    Ton Sai Beach Ocean Conditions

    Monthly averages for Ton Sai Beach, 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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