1m
    Cornwall & Devon, United Kingdom
    Portsmouth Harbour

    POTLESS

    Best months: Jul–Sep

    Protected Area

    Portsmouth Harbour

    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) - POTLESS 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 1m
    StandoutExceptional marine biodiversity

    Potless, a fishing vessel sunk in 1976 after a collision with the ferry 'Southsea', isn't deep. In fact, it's barely a metre, making it an ideal spot for a leisurely snorkel or even a very shallow dive if you fancy getting properly horizontal. What we love about it, though, is its accessibility and the sheer amount of life that has moved in. You'll find the wreck spread across the seabed, a jumble of metal now completely encrusted. We've seen shore crabs scuttling amongst the plates, their claws waving as you pass. Small wrasse dart in and out of the crevices, and sometimes you'll spot a flatfish, almost perfectly camouflaged, pressed against the sand nearby. It’s a gentle introduction to wreck exploration, perfect for building confidence or simply enjoying a different perspective on the underwater world. Our top tip? Go at high tide for the best visibility and a little more water to play in; it can get quite silty if there’s been a lot of boat traffic.

    Typical POTLESS Dive Profile

    Safety Stop0m1m 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.

    Today06:2117:2311h 2m daylightGolden hour 16:38

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    Conditions

    Ocean conditions, forecast and tides for POTLESS

    POTLESS Ocean Conditions

    Monthly averages for POTLESS, 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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