9m
    Cornwall & Devon, United Kingdom
    Plymouth Sound Shores and Cliffs

    HMS ASAMA

    Best months: Jul–Sep

    Protected Area

    Plymouth Sound Shores and Cliffs

    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 ASAMA 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 9m
    StandoutExceptional marine biodiversity

    The HMS Asama is a proper piece of history, just off the coast and lying in a shallow 9 metres. It’s an old trawler, requisitioned as a minesweeper in WWII and sadly sunk by aircraft in 1941. For us, that backstory gives it real character – you’re not just diving a lump of metal, you’re diving a wartime grave. What we love about the Asama is how accessible it is, even for newer divers, but it’s still fascinating enough to keep experienced wreck hounds happy. The wreck itself is reasonably intact, spread across the seabed, and you can still make out the main features of the ship. We've spent hours poking around the bow and stern sections, imagining it in its working days. Visibility can be a bit hit-and-miss, like much of the UK, but on a good day, the structure comes into sharp focus. Keep an eye out for plenty of conger eels in the nooks and crannies – they’re a common sight here – and the usual suspects like blennies and crabs making themselves at home amongst the plates. It’s a great site for a relaxed explore, especially on a slack tide, and a solid choice when you want a tangible link to the past.

    Typical HMS ASAMA Dive Profile

    5m10mSafety Stop0m9m max~60 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

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

    Today06:3317:3511h 3m daylightGolden hour 16:51

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    Conditions

    Ocean conditions, forecast and tides for HMS ASAMA

    HMS ASAMA Ocean Conditions

    Monthly averages for HMS ASAMA, 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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