13m
    Intermediate
    Cornwall & Devon, United Kingdom
    South of Portland

    P-555 (Wreck)

    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) - P-555 (Wreck) 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 13m
    StandoutExceptional marine biodiversity

    The P-555, a former Admiralty fuel barge, often gets overlooked for some of Cornwall’s more dramatic wrecks, but we think that's a mistake. We love its compact size and how well-preserved it is, sitting upright on a sandy seabed in just 13 metres of water. Dropping onto the deck, you’ll find yourself navigating through the superstructure, with schools of pollack swirling around the remaining winches and machinery. What makes the P-555 a standout for us is the sheer density of life that has colonised every available surface. Spider crabs clamber over encrusted metal, nudibranchs graze on hydroids, and we’ve often found small conger eels peeking out from darker recesses. It’s an ideal site for anyone looking to spend a full dive exploring every nook and cranny without worrying about extreme depth or challenging currents. Our favourite trick is to explore the interior spaces, which are surprisingly open and accessible, just remember to bring a good torch to really appreciate the colours of the anemones and jewel anemonies that carpet the internal walls.

    Typical P-555 (Wreck) Dive Profile

    5m10m15mSafety Stop0m13m max~50 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.

    Always perform a 3-minute safety stop at 5m before surfacing.

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

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    Conditions

    Ocean conditions, forecast and tides for P-555 (Wreck)

    P-555 (Wreck) Ocean Conditions

    Monthly averages for P-555 (Wreck), 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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