27m
    Cornwall & Devon, United Kingdom
    Offshore Overfalls

    WAR HELMET

    Best months: Jul–Sep

    Protected Area

    Offshore Overfalls

    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) - WAR HELMET 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 27m
    StandoutExceptional marine biodiversity

    The War Helmet is one of our favourite Cornwall wrecks, a proper deep dive that still offers plenty to see. She went down in 1918, torpedoed by a German U-boat, and now rests upright on the seabed at 27 metres. You descend into a green gloom that clears around 15 metres, revealing her huge silhouette. The sheer scale is what gets you first; this was a big ship, 135 metres long, and you feel that bulk as you fin along her decks. What we love here are the details. Her twin boilers are still prominent, often swarming with pollack, and you can poke around the remains of the triple-expansion engines. Look for conger eels tucked into the darker recesses, their heads peering out, wary but curious. We've seen dogfish nosing around the debris field, too. It’s a proper historical dive, a poignant reminder of WWI, and suits experienced divers comfortable with deeper, darker conditions. Visibility can be patchy, but on a good day, when that green light penetrates, it's really something special. We always suggest diving on a neap tide for the best conditions.

    Typical WAR HELMET Dive Profile

    10m20m30mSafety Stop0m27m 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 27m - 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.

    Today06:1917:2111h 2m daylightGolden hour 16:37

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    Conditions

    Ocean conditions, forecast and tides for WAR HELMET

    WAR HELMET Ocean Conditions

    Monthly averages for WAR HELMET, 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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