46m
    Cornwall & Devon, United Kingdom
    South of Portland

    ULL (PROBABLY)

    Best months: Jul–Sep

    Protected Area

    South of Portland

    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) - ULL (PROBABLY) 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 46m
    StandoutExceptional marine biodiversity

    The ULL, formerly known by a string of names like Tosca and Peritia, is a proper deep dive off the coast of Cornwall. At 46 metres, it’s certainly not for the casual diver; this is one for those with the training and comfort at depth. We love the history here, imagining this steamship, built in Flensburg back in 1880, finally coming to rest in 1917. What you get is a coherent wreck, still largely intact despite its age and depth. We find the single boiler a real focal point, and the compound expansion engine is still recognisable, a testament to its sturdy build. Visibility can be a challenge, as with many UK wrecks, but on a good day, the ULL reveals itself through the silty water, draped in anemones and dead man's fingers. Ling often lurk in the shadowed corners, and you might spot a few dogfish resting on the deck plates. It’s a quiet, reflective dive, feeling the chill of the deep, a tangible connection to maritime history. Come prepared for the cold and the depth, and you’ll find a rewarding exploration here.

    Typical ULL (PROBABLY) Dive Profile

    15m30m45mSafety Stop0m46m max~15 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

    Maximum depth 46m exceeds recreational limits (40m). Technical diving certification and equipment required.

    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.

    Today06:2717:3011h 3m daylightGolden hour 16:45

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    Conditions

    Ocean conditions, forecast and tides for ULL (PROBABLY)

    ULL (PROBABLY) Ocean Conditions

    Monthly averages for ULL (PROBABLY), 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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