Similan Islands, Thailand
    Muko Surin

    Turtle Ridge (Turtle Ledge)

    Best months: Jan–May

    Protected Area

    Muko Surin

    Why dive here

    With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Turtle Ridge (Turtle Ledge) offers some of Similan Islands's richest reef 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
    CharacterReef dive
    StandoutExceptional marine biodiversity

    Turtle Ridge, or Ledge, as some call it, is one of those Similan sites we always make time for. Forget the name, it's not just about turtles, though you'll often find green and hawksbill grazing in the shallows. What we really love here is the sheer health of the hard corals, particularly the sprawling fields of staghorn. They stretch out, creating these intricate canyons and swim-throughs where we’ve found everything from two-toned pygmy squid clinging to a branch to the flash of a Dapple Coris darting through. Our favourite approach is usually a drift along the main reef, letting the gentle current carry us past dense schools of jacks that swirl and pulse. Keep an eye out for those subtly patterned dusky wrasse picking through the corals. If you're lucky, a whale shark might cruise by, but even without that big draw, the reef itself is vibrant. It’s a site that rewards a slow pace, letting you really appreciate the smaller details and the sheer volume of healthy coral. Perfect for divers who appreciate a robust reef and don't mind a leisurely exploration.

    Today06:1718:1511h 58m daylightGolden hour 17:47

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    Conditions

    Ocean conditions, forecast and tides for Turtle Ridge (Turtle Ledge)

    Turtle Ridge (Turtle Ledge) Ocean Conditions

    Monthly averages for Turtle Ridge (Turtle Ledge), 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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