21m
    Cornwall & Devon, United Kingdom

    LST 523

    Best months: Jul–Sep

    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) - LST 523 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 21m
    StandoutExceptional marine biodiversity

    The LST 523, a Landing Ship Tank, holds a somber story, sunk by a mine just days after D-Day. We love a wreck with history you can almost feel, and this one delivers. Lying in 21 metres, she’s well within recreational limits, perfect for divers wanting to explore a substantial piece of wartime history without deep-diving complications. Dropping down onto the LST, the sheer scale of the vessel quickly becomes apparent. The bow section is particularly impressive, rising from the seabed, still showing the damage that sent her down. Inside, the cavernous tank deck is now home to an impressive collection of marine life. We’ve found conger eels the size of small tree trunks lurking in the darker corners, and the hull is absolutely plastered with jewel anemones and dead man’s fingers, creating a vibrant, colourful tapestry over the rusted metal. Schools of bib and pollack swirl around the structure, darting in and out of the openings where tanks would have once rolled. It's an atmospheric dive, giving you a real sense of the past while also showcasing the resilience of nature. For the best light on the internal spaces, we’d suggest a mid-morning dive when the sun is higher.

    Typical LST 523 Dive Profile

    10m20mSafety Stop0m21m max~30 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

    Depth of 21m - Advanced Open Water certification recommended.

    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.

    Today06:1917:2411h 5m daylightGolden hour 16:40

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    Conditions

    Ocean conditions, forecast and tides for LST 523

    LST 523 Ocean Conditions

    Monthly averages for LST 523, 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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