2m
    Cornwall & Devon, United Kingdom
    The Manacles

    PORT CHALMERS

    Best months: Jul–Sep

    Protected Area

    The Manacles

    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) - PORT CHALMERS 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

    Port Chalmers isn't your typical deep-sea wreck dive. It’s better, in our opinion. This sailing vessel, sunk in 1886 off the Manacles, now lies in just two metres of water, making it perfect for a snorkel or a very shallow shore dive. We love this site because it’s so accessible and yet packed with history. You can trace the outline of its 76-metre hull, even seeing bits of the original structure poking through the kelp. Imagine this: the sunlight filtering through the shallow water, illuminating the barnacle-encrusted plates of steel. Schools of juvenile pollack dart in and out of the crevices, and we’ve often spotted a grumpy crab or two scuttling across the seabed, using the wreck as shelter. It feels incredibly personal to be able to get so close to something that was once so grand, now reclaimed by the sea. For photographers, the natural light is a huge bonus, and for those who prefer not to don a full set of gear, it’s a truly rewarding snorkel. We’d suggest going at high tide for the best visibility over the wreck.

    Typical PORT CHALMERS 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 4m daylightGolden hour 16:56

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    Conditions

    Ocean conditions, forecast and tides for PORT CHALMERS

    PORT CHALMERS Ocean Conditions

    Monthly averages for PORT CHALMERS, 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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