Independent French dive directory noting boat-only access and guide use.
Boat-only Marseille wall with gorgonian ledges
Boat-only Marseille wall with gorgonian ledges
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Boat access and route planning are handled by local clubs around Marseille.
La Pierre de Cassis is a Grand Congloué wall-and-plateau dive that runs out from the rock into a beak-shaped ridge. It is a boat-only Marseille classic for steady bottom time on the upper ledges, where gorgonians, groupers, barracudas, lobsters, and other Mediterranean life hide in faults and overhangs when the weather is settled.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
15m - 65m
Depth Note
The upper ridge starts around 15 m and the main walls drop to 60 m plus, so route choice matters.
Best Season
June to September
Typical Conditions
Settled weather and light sea state are best. East wind can roughen the surface and make visibility less clean.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Recommended for intermediate to advanced divers due to depth and the presence of overhangs.
Access Restrictions
Boat access only; keep to the authorized diving face of the islet and follow local marine-protection rules.
Legal Notes
Respect the protected zones around Grand Congloué and follow the briefing from your local operator.
Community notes to help plan your visit.
Scuba Diving
Plan a controlled boat dive on the plateau and ridge, with conservative depth management and a clear ascent plan.
Freediving
Not a practical freedive target; the useful structure sits too deep for casual breath-hold exploration.
Snorkeling
Not a practical snorkel site; the interesting structure begins well below the surface.
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
Independent French dive directory noting boat-only access and guide use.
Operator infrastructure and support facilities near the sea.
Independent Marseille diving guide with a numeric visibility baseline.
Official Marseille tourism page with season and visibility guidance.
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