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.

Pointe de Chaucre is a reef site located on the northwestern tip of Oléron in Arcachon Bay. The topography consists of a mix of sand and rocky reefs, with submerged ridges and rock pools accessible at low tide. This site is suitable for beginners, with depths ranging from 1 to 7 metres and an average depth of 4 metres. Shore entry is standard, though divers and snorkellers should be aware of potential hazards including surf, surge, rip currents, and variable visibility between 2 and 8 metres. Water temperatures fluctuate between 10C and 19C throughout the year. Facilities available at the site include parking, toilets, first aid, and a cafe.

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.

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.

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.

Anse de la Croix is a sheltered cove located adjacent to the lighthouse in Arcachon Bay. This site features rocky outcrops near the pier that provide a habitat for various marine life, including local reef fish and invertebrates typical of the Atlantic Coast. With shallow depths, the area is suitable for beginners and offers a shore entry. Water temperatures fluctuate throughout the year, ranging from 10C in winter to 20C during the summer months. Snorkellers can enjoy views of Fort Boyard while exploring the coastal environment. The site is rated 3 out of 5 for snorkelling quality.

Plage aux Coquillages in Arcachon Bay is a shell-covered beach located on the eastern side of the car-free Île d'Aix. This site features a mix of sandy and rocky bottom topography, providing a shallow environment suitable for beginners. Snorkellers can expect moderate currents and visibility ranging from 3 metres upwards. Water temperatures fluctuate between 10C and 20C throughout the year. Access is via the shore, and the site is equipped with parking, toilets, and showers. Typical sessions last approximately 45 minutes. Due to the nature of the terrain, be aware of sharp coral and potential low visibility conditions.