Cornwall & Devon, United Kingdom
    Foreland

    HMS Hermes

    Best months: Jul–Sep

    Protected Area

    Foreland

    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) - HMS Hermes 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
    StandoutExceptional marine biodiversity

    Diving the HMS Hermes in the cooler waters off Cornwall is a proper adventure, a real piece of history waiting to be explored. This isn’t a shallow reef bimble; it's a deep, dark dive onto a Highflyer-class cruiser that settled here in 1919 after a collision. What we love about the Hermes is its intact structure, allowing you to trace the deck plan and imagine life aboard. Descending through the green, often silty water, the sheer size starts to become apparent. The bow is particularly striking, often draped in fishing nets, home to lobster and crab tucked into every crevice. We’d suggest focusing on the midship section, where the superstructure has collapsed into fascinating rubble, creating overhangs perfect for conger eels. Visibility can swing wildly here, so pick your day carefully, ideally on a neap tide for less current. It’s a dive for those comfortable with deeper UK waters, typically hitting 40m plus, and certainly one of our favourite historical wrecks in the area.

    Safety Notes

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

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    Conditions

    Ocean conditions, forecast and tides for HMS Hermes

    HMS Hermes Ocean Conditions

    Monthly averages for HMS Hermes, 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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