Similan Islands, Thailand
    Phuket Environmental Protected Area

    HMS Stoic

    Best months: Jan–May

    Protected Area

    Phuket 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 - HMS Stoic offers some of Similan Islands's richest wreck 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
    CharacterWreck dive
    StandoutExceptional marine biodiversity

    The HMS Stoic, a British S-class submarine, went down in 1943, and she’s a proper dive. We’ve always found wreck dives in the Similans to be a bit hit or miss, but this one delivers. Dropping down, you hit the conning tower first. It’s pretty intact, still recognizable, even after all these years on the seabed. We love seeing the resident Diana's hogfish darting around the structure; they’re bold and always put on a show. Our favorite part is nosing along the deck. You’ll find schools of shorthead anchovies shimmering in the dimmer light, and if you’re patient, a few horseshoe crabs often scuttle along the sand nearby. The stern is more broken up, but that just creates more nooks for Jansen’s wrasse to hide. Currents can be present here, so pick your day, but the visibility is generally excellent. It’s a dive for those who appreciate history and enjoy the contrast of metal reclaiming marine life – a real classic.

    Safety Notes

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Today06:1418:1311h 59m daylightGolden hour 17:45

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    Conditions

    Ocean conditions, forecast and tides for HMS Stoic

    HMS Stoic Ocean Conditions

    Monthly averages for HMS Stoic, 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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