Scapa Flow, Orkney, United Kingdom
    North-west Orkney

    Wreck of Os

    Good diving all year

    Protected Area

    North-west Orkney

    Why dive here

    With 140+ marine species recorded in the area - including blue whales, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - Wreck of Os offers some of Scapa Flow, Orkney's richest wreck diving. Water ranges 8-14°C, warmest July, August, September.

    Best timeYear-round
    WetsuitA drysuit
    Marine lifeBlue Whales, Dolphins, Dwarf Minke Whales, Humpback Whales and Ocean Sunfish (Mola Mola) · 140+ species recorded
    Water8-14°C · warmest July, August, September
    CharacterWreck dive
    StandoutRich in charismatic marine life

    There are plenty of wrecks scattered across Scapa Flow, but the *Os* holds a special place for us. It’s one of the shallower ones, often a good second dive, sitting upright in about 15 metres. That makes it accessible for less experienced wreck divers without sacrificing any of that classic Scapa Flow atmosphere. The ship itself is a smaller, cargo vessel, not one of the mighty German fleet, but don't let that fool you. What we really love about the *Os* is how remarkably intact it is. You can still make out the superstructure, the holds, even some of the deck gear. Penetration is possible for those with the right training, and it’s a genuinely evocative experience to swim through those dark internal spaces. The light, even on a cloudy day, filters down beautifully, illuminating the thick carpets of plumose anemones that cling to every surface. Look for the massive conger eels peering out from gaps in the plating, and the schools of saithe that swirl around the mast. Our favourite time to dive it is on a slack tide, when the water settles, and the silence down there is really something. Just remember, this is cold water diving – a drysuit is a must.

    Safety Notes

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

    Cold water this month (avg 13°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today06:4217:1910h 38m daylightGolden hour 16:23

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    Conditions

    Ocean conditions, forecast and tides for Wreck of Os

    Wreck of Os Ocean Conditions

    Monthly averages for Wreck of Os, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (58.64, -3.16) (8km away)

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    October Averages

    Sea Temperature

    13°C

    55°F · Range: 11.4–13.8°C

    Air Temperature

    10°C

    50°F

    Wind Speed

    9.26 m/s

    18.0 knots

    Atmospheric Pressure

    1005.3 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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