Cromhall Quarry
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.
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
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.
Nearest Dive Centres to Cromhall Quarry
Dive shops near Cromhall Quarry
The Lake
Extreme Marine
InDepth
Dive 90
Vobster Quay Dive Shop
Welsh Diving
Reviews for Cromhall Quarry
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)
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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