Saye's Hole
Cave and mine diving in South Wales and Mendip · about 12 km from Wells
- Max depth
- 10 m
- Type
- Small cylinders / no-mount
- Certification (estimate)
- Full cave
The Somerset Sump Index rates this site as of limited diveability. Short passage to a lake chamber; the rift leads into the underground main river of Cheddar.
The Somerset Sump Index rates this site as of limited diveability. Short passage to a lake chamber; the rift leads into the underground main river of Cheddar.
- Depth and profile
- More than 10 m: through a narrow rift at -10 m into the underground main river.
- Configuration
- Small cylinders or sidemount only: tight and marginal.
- Access
- Private land: ask the CDG Somerset Section about access and the current arrangements.
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Searched automatically, last on 5 Oct 2026.
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Current conditions
Visibility, flow and water levels change quickly. Right before your dive, check what other divers report:
- Cave Diving Group (CDG) ↗
The British cave-diving club (Somerset and Welsh sections): access, conditions and temporary membership for overseas cave divers.
- Cave Diving Group (Facebook) ↗
The CDG's page with news.
- UK Mine/Cave Diving and Exploration (UKMC) ↗
Club for mine and cave divers (Intro Cave/Mine minimum), with BCA insurance via the club and a private members' Facebook group on conditions and trips.
- UK Caving forum ↗
British caving forum with Wales, Mendip and Forest of Dean sections; diving topics too.
- FoDCCAG – Caves & access ↗
Forest of Dean access group: permits for BCA members.
Plan a cave diving trip to South Wales and Mendip
Enter your team, with certifications, gas and configurations, and see right away which caves fit. With driving times from your stay, fill stations and an AI instructor who thinks along.
Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from public sources (Cave Diving Group, InDEPTH 2020–2021, TDI/Scubaverse 2019–2021, UKMC, ogof.org.uk, Brecon Beacons National Park Authority 2009, Wikipedia, aditnow, Coflein, Natural Amenities Ltd, cave-dive-make, FoDCCAG, mindat, Martyn Farr/Vertebrate 2024, British Caving Association, British Hyperbaric Association, DDRC, NDAC, divernet, Vobster Quay and Cardiff Scuba; Sept 2026). The Mendip sites with a page number come from the Cave Diving Group's Somerset Sump Index (4th edition, 2008), with that book's rating as diveable or of limited diveability; sites the book rates as not diveable are left out. Pins converted from grid references (ogof.org.uk, aditnow, mindat, the Sump Index; ~100 m) or taken from Wikipedia; the Noxon Park pin is accurate to ~100 m. ~ = estimate. Access and rules change — check locally.