Similan Islands, Thailand
    Mu Ko Similan

    Ko Bon

    Best months: Jan–May

    Protected Area

    Mu Ko Similan

    Why dive here

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

    Ko Bon is where we head when we're hoping for manta rays, particularly between November and May. It's a slope that descends to around 30 metres, covered in hard corals higher up and gorgonian fans deeper. The main draw is the cleaning station, a good spot to wait patiently for the big stuff. Currents can pick up, so it's best for experienced divers comfortable with drift diving.

    Today06:1718:1511h 58m daylightGolden hour 17:48

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    Conditions

    Ocean conditions, forecast and tides for Ko Bon

    Ko Bon Ocean Conditions

    Monthly averages for Ko Bon, 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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