31m
    Cornwall & Devon, United Kingdom
    Bedruthan Steps and Park Head

    ONEGA (POSSIBLY)

    Best months: Jul–Sep

    Protected Area

    Bedruthan Steps and Park Head

    Why dive here

    With 176+ marine species recorded in the area - including blue sharks, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - ONEGA (POSSIBLY) offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 5mm wetsuit
    Marine lifeBlue Sharks, Dolphins, Dwarf Minke Whales, Humpback Whales and Ocean Sunfish (Mola Mola) · 176+ species recorded
    Water10-18°C · warmest July, August, September
    CharacterWreck dive · max 31m
    StandoutExceptional marine biodiversity

    The Onega, a big old steamship from 1880, sits upright in around 31 metres of water off the coast of Cornwall. We love a wreck with some history, and this one, originally the British Queen, has had a few names in her time before she went down in 1918. You'll drop onto a truly substantial vessel, 122 metres of broken metal, and the sheer scale is the first thing that hits you. The stern, in particular, is a favourite section of ours for exploring, with its rudder still intact and the propeller blades often visible in decent visibility. Inside the hull, you'll find the three boilers, now home to plump conger eels that peer out from the darkness. We’ve had some fantastic dives here, often spotting dogfish tucked into crevices and schools of pollack circling the higher points of the wreck. It's an atmospheric dive, especially when the light filters down through the green water. Current can pick up, so we always suggest timing your dive for slack water to make the most of the penetration opportunities. This is a dive for experienced wreck enthusiasts who appreciate the bones of a ship.

    Typical ONEGA (POSSIBLY) Dive Profile

    15m30mSafety Stop0m31m max~20 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

    Deep dive (31m) - monitor air consumption closely. Advanced certification recommended.

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

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today06:3717:3911h 3m daylightGolden hour 16:55

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    Conditions

    Ocean conditions, forecast and tides for ONEGA (POSSIBLY)

    ONEGA (POSSIBLY) Ocean Conditions

    Monthly averages for ONEGA (POSSIBLY), sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (50.44, -2.73) (3km away)

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    October Averages

    Sea Temperature

    17°C

    62°F · Range: 15.1–17.5°C

    Air Temperature

    13°C

    56°F

    Wind Speed

    8.14 m/s

    15.8 knots

    Atmospheric Pressure

    1011 hPa

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

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