2m
    Cornwall & Devon, United Kingdom
    South of Portland

    RELIANCE (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) - RELIANCE (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 2m
    StandoutExceptional marine biodiversity

    The Reliance (probably) isn’t your typical deep-water wreck dive. This isn't a site for hitting depth or seeing pelagics. We’re talking about a shallow scramble into a cave on the east side of Portland Bill, sometimes more of an archaeological treasure hunt than a dive. The wreck, a sailing vessel that ran aground in 1949, is scattered. You’ll find bits of hull and superstructure wedged into the rocks, some pieces still remarkably intact, offering a glimpse into its final moments. Our favourite way to experience this is on a calm day, at low tide, with a good snorkel or, if you're comfortable, a very shallow freedive. The light filters in beautifully, illuminating the encrusting life – anemones, barnacles, and small crabs hiding in the shadows. It’s an intimate exploration, feeling the cold rock and the old wood. You’ll spend your time piecing together the story of the ship, imagining the storm that brought it here. This is a site for the history buffs and those who appreciate the subtle beauty of coastal erosion and marine reclamation, rather than vibrant coral or big fish.

    Typical RELIANCE (PROBABLY) 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.

    Today06:2617:2811h 2m daylightGolden hour 16:44

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    Conditions

    Ocean conditions, forecast and tides for RELIANCE (PROBABLY)

    RELIANCE (PROBABLY) Ocean Conditions

    Monthly averages for RELIANCE (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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