Petit Bec is a rocky reef site located at the northern tip of the island near Les Portes-en-Ré in Arcachon Bay. This shore-entry site is suitable for intermediate divers, with depths ranging from 1 to 5 metres and an average of 3 metres. Divers should be aware of potential hazards including rip currents, strong currents, surf, and entanglement. Visibility varies between 3 and 10 metres. Species recorded around this area include crabs, sea hares, sea stars, spiny spider crabs, shrimp, snails, shannies, and sea squirts. The site offers basic facilities including parking, showers, changing rooms, and first aid, with a dive shop nearby.

Le Gers is a wreck dive located in Arcachon Bay, resting at depths between 10 and 15 metres. Access to this site is by boat only. Divers encounter mild currents that can strengthen, requiring careful monitoring of conditions and timing dives around slack water. Visibility at the site typically ranges from 5 to 10 metres. Due to the nature of the wreck, there is a risk of entanglement, and divers should maintain distance from structural elements. This site is suited for intermediate divers who possess good buoyancy control. Always keep a surface marker buoy accessible and confirm local conditions before departure.

Le Nautilus is a combined reef and wreck site located in Arcachon Bay. The site features a wide depth range extending from 6 to 50 metres, allowing beginners to explore shallower sections while providing technical depths for experienced divers. Visibility typically ranges between 5 and 10 metres, requiring divers to maintain close contact with their buddy. Water temperatures are cool, fluctuating between 10 and 15 degrees Celsius throughout the year, making a drysuit or a thick 7mm wetsuit essential for comfort. Access to the site is by boat only, and divers should verify current forecasts and departure times with their charter operator before planning their dive.

Le Rochas in Arcachon Bay is a marine site featuring a reef, drop-off, and drift diving opportunities. The site reaches depths between 9 and 23 metres. Divers should be aware of strong currents and potential entanglement hazards in this environment. Water temperatures fluctuate throughout the year, ranging from 10C in winter to 16C during the summer months. Night diving is permitted at this location. Species recorded around this area include crabs, sea stars, snails, and sea squirts. Given the variable conditions and currents, this site is best suited for experienced divers comfortable with drift diving techniques.

The Cristina Rueda is a shallow wreck located 1600 metres offshore in Arcachon Bay, France. Resting at an average depth of 8 metres, with a range of 6 to 10 metres, this site is suitable for beginner divers. Access is by boat only, and the site features mild currents with visibility typically between 5 and 10 metres. Divers should remain aware of the wreck structure to avoid entanglement hazards. Water temperatures fluctuate between 10C and 19C throughout the year. Local facilities provide air fills, equipment rental, and guided tours to assist with navigating the wreck layout.

Le Saint Yves is a boat-accessible dive site located in Arcachon Bay, France. The site features depths ranging from 40 to 45 metres, making it suitable for experienced divers. Conditions are variable, with visibility typically between 5 and 10 metres and mild currents. Water temperatures fluctuate throughout the year, ranging from 10C in the winter months to 15C during the summer. Species recorded around this area include crabs, sea stars, and various snails. Divers should be prepared for temperate marine conditions and plan their dives according to the specific depth and environmental factors present at this location.

U 263 is a submarine wreck located off the coast of Arcachon Bay. Resting at depths between 29 and 30 metres, this site is suited for intermediate divers with advanced certification. Access is by boat only, with the wreck situated approximately 33 kilometres from the shore. Divers encounter mild currents and visibility ranging from 5 to 15 metres. Water temperatures are cold, fluctuating between 10 and 16 degrees Celsius throughout the year. Due to the depth and the nature of the structure, divers must manage entanglement risks and maintain precise buoyancy control. Thermal protection such as a drysuit or a 7mm wetsuit with hood and gloves is recommended.

Plage de la Cible in Arcachon Bay offers a shallow reef environment suitable for beginners. The site features a long pontoon and submerged rocky structures that are best explored at high tide when the water covers the oyster-encrusted rocks. Depths range from 1 to 10 metres, with an average of 5 metres. Access is via the shore, and facilities including parking, toilets, and showers are available nearby. Divers and snorkellers should be aware of potential hazards, including surf and sharp oyster-encrusted rocks. Water temperatures fluctuate between 10C and 20C throughout the year.