Exact Devil's Glen site page.
Boat-only cold-water ledge dive off Appledore Island.
Boat-only cold-water ledge dive off Appledore Island.
Devil's Glen is a boat-only cold-water dive off Appledore Island in the Isles of Shoals, with a rugged ledge-and-crevice profile that rewards slow, deliberate navigation. Expect exposed offshore conditions, rock structure full of cracks and overhangs, and a site that can go from workable to rough when wind or tide builds. Clearer windows and steady buoyancy matter more than depth alone.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
0m - 18m
Depth Note
Maximum depth is reported around 16-18 m (51-60 ft).
Best Season
Summer and early fall, when charter access is common and weather windows are more forgiving.
Typical Conditions
Rocky offshore ledges and crevices with average visibility around 5-6 m; current, swell, and weather can shift the site quickly.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Boat timing matters because the site is exposed, and rough weather can make the dive poor or unsafe. Keep buoyancy precise around cracks and ledges, and avoid the site when wind or swell builds.
Access Restrictions
Boat access only; plan around weather, tide windows, and charter or island logistics.
Legal Notes
Use approved boat access and follow Appledore and Isles of Shoals landing and diving rules.
Community notes to help plan your visit.
Scuba Diving
A boat-only ledge-and-crevice dive for confident divers, with the best sessions on calmer sea-state windows.
Freediving
Not a freedive-first site; the boat-only offshore access and broken rock structure fit scuba better.
Snorkeling
Not a practical snorkel target except in very calm fringe conditions.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Exact Devil's Glen site page.
Local operator page for Isles of Shoals charters and conditions.
Appledore Island dive-program and facility context.
Regional Isles of Shoals dive guide and wildlife context.
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