Diving Le Tombant de Cassis
Site Overview
Le Tombant de Cassis is a wall and reef dive site in Provence & Calanques, France, reached from the base town of Cassis. Le Tombant de Cassis is a sheer wall east of Cassis dropping from 12 m to 40 m into the blue. Anthias, moray eels and red gorgonians cover the wall while barracuda cruise above. The site reaches a maximum depth of 40 m with an average profile around 26 m and a shallow start near 12 m, which places it firmly in the advanced category and means divers should hold at least an Advanced Open Water certification. Conditions are typical of the French coastal coast: visibility generally runs from 15 to 35 metres, the current is moderate, and the water temperature ranges between 14 and 25 degrees Celsius with low surge exposure. The marine community is centred on Dusky Grouper, Common Barracuda, Red Gorgonian, Mediterranean Moray, Amberjack, Two-banded Seabream, and the full species list is detailed below for divers planning a trip. Le Tombant de Cassis is a strong representative of why Provence & Calanques diving is so highly regarded, blending the geology, history and biodiversity that define French underwater exploration. It pairs naturally with the other sites of the Provence & Calanques region for a varied holiday, and with the right thermal protection and, where relevant, the correct specialist training, it offers a memorable dive for photographers, naturalists and wreck or reef enthusiasts alike.
Dive Briefing
"Entry is made by boat from Cassis with a transfer of about 15 minutes, and divers should check in with a local centre in Cassis before entering the water. Le Tombant de Cassis is a sheer wall east of Cassis dropping from 12 m to 40 m into the blue. Anthias, moray eels and red gorgonians cover the wall while barracuda cruise above. Plan your profile around a maximum depth of 40 m and an average of 26 m, keeping a close eye on gas and, in the deeper or enclosed sections, on the low surge. Buoyancy control matters here: the limestone and sand bottom and submerged structures are easily disturbed, and Wall to 40 m, Current at the cape, Boat traffic are real considerations throughout the dive. The wall and reef topography offers wall, drop-off, and the marine life centres on Dusky Grouper, Common Barracuda, Red Gorgonian, Mediterranean Moray, Amberjack, Two-banded Seabream alongside the other species listed for the site. Take a moment to review the site-specific hazards with your guide, because conditions at Le Tombant de Cassis can shift with wind and tide and change the feel of the dive. A safe ascent with a surface marker buoy and a clear exit plan completes the dive, with emergency cover routed through Centre Hyperbare, Hôpital de la Conception, Marseille."
Signature Marine Life
Dusky Grouper
Epinephelus marginatus
Best: May, June, July
Common Barracuda
Sphyraena sphyraena
Best: May, June, July
Red Gorgonian
Paramuricea clavata
Best: May, June, July
Mediterranean Moray
Muraena helena
Best: May, June, July
Amberjack
Seriola dumerili
Best: May, June, July
Two-banded Seabream
Diplodus vulgaris
Best: May, June, July
Safety & Hazards
- Wall to 40 m
- Current at the cape
- Boat traffic
- Depth and gas planning
- Variable visibility
Traveler Notes
Who is this for?
Le Tombant de Cassis suits advanced divers holding at least an Advanced Open Water certification, and it is a strong choice for those who enjoy the French coastal water of the French coast. Photographers, training groups and divers chasing wall, reef, advanced, drift, photography will all find something here, provided they respect the temperature, the marine park rules and the limits of each site. It is less suitable for absolute novices unless booked through a centre running a supervised course, and the deepest or most enclosed sections should only be attempted with the correct specialist training and a guide. Planning a dive here with a licensed French operator not only keeps you safe but also helps protect the fragile gorgonian forests, seagrass meadows, wrecks and reefs that make the site special for the next visitor.
For Non-Divers
Cassis port; Cap Canaille; Calanques hiking
Quick Stats
Dive Logistics
- Marseille Plongée
- Calanques Subaquatique
- Club de Plongée Cassis
- Toulon Plongée Centre
Photography Info
Best for: wide_angle, macro
Nearby Stay
Hôtel La Résidence du Vieux-Port
Marseille • 8km away
Hôtel Les Bords de Mer
Marseille • 10km away