Cornwall & Devon, United Kingdom
    Chesil Beach and Stennis Ledges

    HMS M2

    Best months: Jul–Sep

    Protected Area

    Chesil Beach and Stennis Ledges

    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 M2 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

    The HMS M2 is one of those wrecks that just hits differently. She was a submarine turned aircraft carrier, which sounds like something out of a Jules Verne novel, and when you descend through the often green, silty water, her sheer scale starts to emerge. We’ve always found the conger eels here particularly bold, often poking their heads out of portholes or from under plating, keeping a beady eye on you. Exploring the hangar deck, imagining that small seaplane launching from below the waves, is a genuine thrill, a real sense of history brought to life. You’ll want to pick your day carefully for the M2. Slack water is absolutely key, otherwise, the currents can be quite a ride, making it a dive for experienced hands only. When conditions are good, though, the visibility can surprise you, letting you appreciate the delicate crusts of Hairy Sea-mat and the occasional lumpsucker clinging to the superstructure. Look out for the numerous bass circling the wreck and the surprising flashes of solenette blending into the sand nearby. It’s a proper expedition, a deep dive into an unusual piece of naval history, and we love it for that.

    Safety Notes

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

    Today06:2617:2911h 2m daylightGolden hour 16:44

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    Conditions

    Ocean conditions, forecast and tides for HMS M2

    HMS M2 Ocean Conditions

    Monthly averages for HMS M2, 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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