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Scuba diving at Cap Morgiou (Tombant du Cap Morgiou) in Cassis
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Cap Morgiou (Tombant du Cap Morgiou)

GREAT
CassisBoat
About This Site
Cap Morgiou is the flagship western dive of the Cassis roster and the most iconic Calanques wall outside the Riou archipelago. It sits off the seaward tip of the Cap Morgiou headland, the finger of the Calanques massif that juts south into open Mediterranean water west of Cassis toward Marseille. The site's signature is a double drop-off: a first wall falls vertically to a step around 20-25 m, then a second tombant plunges on to roughly 50 m (with tech reaches beyond 55-60 m). Both faces are blanketed in dense red coral (Corallium rubrum) and large gorgonian fans, and small wreckage — a little boat and a scatter of old car wrecks around 45-50 m — shelters fish. The headland is also where diver Henri Cosquer found the prehistoric Cosquer Cave, whose art-filled entrance lies at about 37 m at the nearby Pointe de la Voile (a protected archaeological zone that is off-limits to divers). The second drop-off is reserved for experienced divers, making this one of the marquee deep dives of the region.

Difficulty

Advanced

Max Depth

50m

Type

Boat

Typical Visibility

15m

Conditions Summary

Best time today

6AM - 12PM

GREAT

Best day in forecast

Today

GREAT

2026-07-11

Community-reported visibility

n/a

Warnings for today

None

The site sits on the south-facing seaward tip of the Cap Morgiou headland, with the Calanques massif rising to the north — so the dominant NW-N Mistral, which sweeps down the Gulf of Lion, is blocked as it comes over the high rock behind the point, and the N through NW and NNW sectors are the most sheltered. The open swell window is the whole southern arc: SSE through S to SW is fully exposed, where the long-fetch Scirocco (S-SE) and Libeccio (SW) build the wind-waves that reach the wall. To the east the coast curves back toward the Riou archipelago and Cassis, giving partial shelter, while the west side is shadowed by the headland and the Sormiou/Marseille coast and offshore islands beyond, leaving the WSW-W sectors only partly open. Being a microtidal Mediterranean headland, tide is negligible, but a southerly blow makes the exposed point choppy and can build surge on the wall.

NNEESESSWWNW
Protected
Partially Exposed
Exposed
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Nearby Dive Sites
La Grotte à CorailTombant de Castel VieilPointe CacauTombant de la Cassidaigne