30m
    Cornwall & Devon, United Kingdom
    Baulk Head to Mullion

    HEIDRUN

    Best months: Jul–Sep

    Protected Area

    Baulk Head to Mullion

    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) - HEIDRUN 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 30m
    StandoutExceptional marine biodiversity

    The Heidrun is one of those wrecks that just delivers. Not too deep at 30 metres, so you get decent bottom time, and usually, the visibility holds pretty well here. We love dropping down onto her, seeing the stern section first, then finning along the intact deck towards the boilers. They’re a classic sight, standing proud and covered in plumose anemones – pure white in the torch beam, swaying gently in the subtle surge. It’s an older steamship, built in 1871, carrying anthracite when she went down in 1918. That age means the structure is well-colonised. Expect to find conger eels tucked into every dark crevice and schools of pollock circling above the main hull. Our favourite part is exploring the holds; they’re quite open and you can safely penetrate a little way, feeling the weight of history around you. For divers who appreciate characterful older wrecks and aren't afraid of a bit of chill, the Heidrun is a fantastic dive, offering a real sense of exploration.

    Typical HEIDRUN Dive Profile

    10m20m30mSafety Stop0m30m max~30 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

    Depth of 30m - Advanced Open Water 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.

    Today06:3717:4111h 4m daylightGolden hour 16:57

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    Conditions

    Ocean conditions, forecast and tides for HEIDRUN

    HEIDRUN Ocean Conditions

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

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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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