15m
    Cornwall & Devon, United Kingdom
    Colwell Bay

    JO-ANNE

    Best months: Jul–Sep

    Protected Area

    Colwell Bay

    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) - JO-ANNE 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 15m
    StandoutExceptional marine biodiversity

    The Jo-Anne, a small fishing vessel sunk in 1976 after an unfortunate encounter with a buoy, holds a special place for us in the sheltered waters of Cornwall. At only 15 metres, it’s a perfect introductory wreck dive, especially for those getting their fins wet in UK waters for the first time. We love drifting over her modest remains, a stark reminder of the everyday working boats that plied these coasts. What you'll find here isn't a grand, intact ship, but rather a charming scatter of wooden hull and machinery, now thoroughly adopted by local marine life. Look closely amongst the timbers and you'll spot crabs scuttling for cover, small pollock darting through gaps, and sometimes, a shy conger eel peeking from beneath a salvaged panel. Visibility here can be surprisingly good on a calm day, especially with a bit of sunshine filtering through, highlighting the rich greens and browns of the kelp and anemones that have colonised the wreck. It’s a gentle dive, best enjoyed slowly, allowing time to appreciate the subtle beauty of a wreck returning to the sea.

    Typical JO-ANNE Dive Profile

    5m10m15mSafety Stop0m15m 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.

    Today06:2217:2511h 2m daylightGolden hour 16:40

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    Conditions

    Ocean conditions, forecast and tides for JO-ANNE

    JO-ANNE Ocean Conditions

    Monthly averages for JO-ANNE, 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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