Rocher d'Antioche is a substantial offshore rocky plateau located 1700 metres from the shore in Arcachon Bay. This site features a combination of reef topography and wreck remains, with depths ranging from 8 to 14 metres and an average depth of 11 metres. Due to its exposed location, the site is subject to strong currents, surge, and surf, requiring boat access and careful planning around slack water. Conditions are variable, and the site is suited for advanced divers. Water temperatures fluctuate between 10C and 20C throughout the year. Divers and snorkellers should be aware of potential hazards including cold water, entanglement risks, and strong currents.

Crique de Chaucre is a shallow reef site located in Arcachon Bay, France. Suitable for beginners, the site offers depths between 1 and 4 metres with mild currents. Access is possible from both the shore and by boat. Visibility is consistently around 5 metres, making a dive torch useful for observing details on the reef. Water temperatures fluctuate throughout the year, ranging from 10C in winter to 21C in August, requiring a seasonal wetsuit. As conditions vary, check locally for current facility availability before planning your dive.

The Michel is a wreck site situated in Arcachon Bay, resting at depths between 20 and 30 metres with an average of 25 metres. This site is accessible only by boat and is suited for intermediate divers with deep diving experience. Conditions are challenging, characterised by strong currents and visibility ranging from 5 to 10 metres. Divers should be prepared for water temperatures between 10 and 16 degrees Celsius, making a drysuit or thick wetsuit necessary. Due to the wreck structure, there is a risk of entanglement, and divers must maintain good buoyancy control and carry a cutting tool. Slack water timing is essential for a safe dive.

Le Cap Nord in Arcachon Bay offers a challenging deep-water experience across a mix of reef and wreck terrain. Divers can expect depths between 35 and 45 metres. Due to moderate currents, this site is suited for intermediate divers and is typically explored as a drift dive. Access is strictly by boat, and divers should be prepared for variable visibility of approximately 5 metres. Water temperatures range from 10 to 16 degrees Celsius, necessitating appropriate thermal protection. The site supports a variety of temperate marine life typical of the Atlantic Coast, including reef fish and invertebrates inhabiting the structures.

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.

Plage des Grenettes in Arcachon Bay features a rocky foreshore that extends into submerged reef formations. This shore-entry site is suitable for beginners, with depths ranging from 2 to 5 metres. Divers and snorkellers can explore the rocky topography, which provides a habitat for various reef fish and invertebrates typical of the Atlantic coast. Conditions vary, with visibility between 3 and 10 metres and mild currents. Hazards include surf, rip currents, and sharp rock formations. Facilities at the site include parking and toilets. Typical dives last approximately 30 minutes, and the site is rated 3 out of 5 for snorkelling.

Plage des Grenettes in Arcachon Bay features ancient stone fish locks that function as artificial reefs. These structures provide a unique topography for snorkelers to explore at depths ranging from 2 to 8 metres, with an average depth of 5 metres. Snorkeling is most effective at high tide when the water covers the stone formations. The site is accessed directly from the shore and is suited for intermediate snorkelers. Divers and snorkelers should be aware of potential hazards including surge and sharp coral structures. Facilities available at the site include parking and toilets. Water temperatures fluctuate between 10C and 20C throughout the year.

Fort Boyard Perimeter offers a unique snorkeling experience directly at the base of the historic stone fort. The massive foundation blocks function as an artificial reef, providing a complex structure that supports a variety of marine life typical of the Atlantic Coast habitat. Snorkelers can explore depths ranging from 1 to 10 metres, with an average depth of 5 metres. Access to the site is by boat only, as it is located 2000 metres from the shore. Due to moderate currents and potential boat traffic, this site is best suited for intermediate snorkelers. Water temperatures fluctuate between 10C and 21C throughout the year.