2m
    Cornwall & Devon, United Kingdom
    Swanpool

    UB 128 (POSSIBLY)

    Best months: Jul–Sep

    Protected Area

    Swanpool

    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) - UB 128 (POSSIBLY) 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 2m
    StandoutExceptional marine biodiversity

    Diving the UB 128 (possibly, as the classification suggests) is less about vibrant coral and more about connecting with a moment in history. It sits shallow, just 2 metres, so it’s less a dive and more a snorkel or a free-diving exploration. We love how accessible it is, perfect for those calm summer days when you just want to get wet and see something interesting without all the gear faff. This German submarine, deliberately sunk in 1921 as part of post-war experiments, is now a skeletal frame, barnacle-encrusted and draped in kelp. You can fin slowly along its 55.5-metre length, peering into what would have been the conning tower or imagining the torpedo tubes. The light filters through the green water, illuminating curious wrasse darting in and out of the rusted hull plates, and sometimes a cheeky crab will scuttle from a dark crevice. It’s a moody, reflective experience, a silent museum piece offering a different kind of beauty than a tropical reef. We’d suggest going at high slack tide for the best visibility, otherwise, the surge can really kick up the sediment.

    Typical UB 128 (POSSIBLY) Dive Profile

    Safety Stop0m2m 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.

    Today06:3617:3911h 3m daylightGolden hour 16:55

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    Conditions

    Ocean conditions, forecast and tides for UB 128 (POSSIBLY)

    UB 128 (POSSIBLY) Ocean Conditions

    Monthly averages for UB 128 (POSSIBLY), 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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