12m
    Beginner
    Cornwall & Devon, United Kingdom
    Lydney Cliff

    Cromhall Quarry

    Best months: Jul–Sep

    Protected Area

    Lydney Cliff

    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) - Cromhall Quarry offers some of Cornwall & Devon's richest 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
    Charactermax 12m
    StandoutExceptional marine biodiversity

    Cromhall Quarry is one of those places you go when you need to get wet, pure and simple. It’s a flooded limestone quarry, easy to access and relatively shallow, maxing out at about 12 metres. We often use it for skill refreshes or testing new gear, making it ideal for beginners or those getting back into the swing of things. You’ll find a few submerged objects to navigate, like a small boat and a bus, which add a bit of interest. Visibility can be a bit variable, but on a good day, it’s a perfectly pleasant way to spend an hour underwater. Keep an eye out for the Great Crested Newts, they’re the real stars here, though you might need a sharp eye to spot them.

    Typical Cromhall Quarry Dive Profile

    5m10mSafety Stop0m12m 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

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today06:2717:2711h 0m daylightGolden hour 16:42

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    Conditions

    Ocean conditions, forecast and tides for Cromhall Quarry

    Cromhall Quarry Ocean Conditions

    Monthly averages for Cromhall Quarry, 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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