Banc d'Arguin is a national nature reserve sandbank situated at the mouth of the Arcachon bay near Cap Ferret. This site is accessible exclusively by boat or water taxi from Arcachon or Cap Ferret. Snorkelling is best performed on the interior side of the bank, where the water remains calmer. Conditions vary, with water temperatures ranging from 12C in winter to 22C in August. Species recorded around this area include European Common Cuttlefish, Common Octopus, Gray Seal, Scorpionfish, Conger Eel, various wrasses, Barrel Jellyfish, Tompot Blenny, crabs, sea stars, and Striped Red Mullet. This site is suitable for intermediate snorkellers.

Les Blockhaus at Cap Ferret consists of submerged wartime concrete structures that now function as an artificial reef. This site is suitable for intermediate divers, with depths ranging from 6 to 20 metres and an average depth of 17 metres. Divers may encounter moderate currents, requiring careful planning around slack water. Visibility typically spans 5 to 10 metres. Entry can be made by boat or from the shore, though shore entries require caution due to unpredictable surf and shore breaks. Water temperatures fluctuate between 12 and 18 degrees Celsius throughout the year, necessitating appropriate thermal protection. Night diving is permitted at this location.

Les Blockhaus du Pyla consists of submerged WWII bunkers located off the beach near the Dune du Pilat. These structures serve as artificial reefs, with walls colonised by mussels and anemones. The site is accessible via a shore entry from the Corniche beach. Due to the nature of the location and the swim required, it is suitable for advanced snorkellers. Access is restricted to high tide conditions. Water temperatures at this Atlantic Coast site vary throughout the year, ranging from 12C in the winter months to 22C in August.

Les deux digues consists of two artificial reef structures located 50 metres from the shore at Cap Ferret. These structures provide a habitat in an otherwise sandy environment. Divers can explore depths ranging from the shallows down to 27 metres. The site is accessible via a shore entry, though divers must monitor surf conditions, rip currents, and active boat traffic. Visibility is typically limited to 5 metres, and currents are generally mild but can strengthen. Due to the boat traffic, towing a surface marker buoy is essential throughout the dive. Beginners should favour shallower depths given the visibility and current conditions.

Hortense is a wreck and artificial reef site located near Cap Ferret, offering depths ranging from 1 to 31 metres with an average depth of 30 metres. The site is suitable for intermediate divers and snorkellers, with both boat and shore entry options available. Conditions are characterised by strong currents, making it essential to consult tidal tables and target slack water for your dive. Water temperatures fluctuate between 12 and 18 degrees Celsius, necessitating a thick wetsuit or drysuit. Due to the depth and potential for strong currents, divers should monitor their profiles closely and remain aware of local boat traffic at the surface. Night diving is also permitted at this location.

Chez Hortense is a diverse dive site in Arcachon, France, featuring a combination of a wall, an artificial reef, and a wreck. The site offers depths ranging from 10 to 30 metres and requires boat access. Divers navigate variable currents and visibility typically between 4 and 10 metres. The topography includes large rock formations and submerged structures. Species recorded around this area include European Common Cuttlefish, Common Octopus, Marbled Electric Ray, Gray Seal, wrasses, Conger Eel, scorpionfish, crabs, Barrel Jellyfish, Tompot Blenny, Common Sea Star, Spiny Spider Crab, and brittle stars. Water temperatures fluctuate between 12C and 18C throughout the year. Hazards include boat traffic, strong currents, and entanglement risks.

Le Chariot is a wreck and artificial reef located 3000 metres off the coast of Cap Ferret. The site sits at depths ranging from 20 to 41 metres, with an average depth of 30 metres. Access is strictly by boat, and divers must be prepared for variable currents that require careful planning around tidal tables. Due to the significant depth and potential for strong currents, this site is suited for intermediate divers. Species recorded around this area include European Common Cuttlefish, Common Octopus, wrasses, scorpionfish, conger eels, crabs, Tompot Blenny, Barrel Jellyfish, brittle stars, Common Sea Stars, Spiny Spider Crabs, snails, sea squirts, and sea cucumbers.

Plage de Laouga in Cap Ferret is a shallow reef site located on the northern shore of the lake. Sheltered by surrounding pine forests, the area features fine white sand and shallow weed beds. Divers and snorkellers can expect depths ranging from 1 to 7 metres, with an average depth of 4 metres. Conditions are generally calm with mild currents and visibility typically between 5 and 10 metres. This site is suitable for beginners and offers shore access. Water temperatures fluctuate throughout the year, ranging from 12C in winter to 22C in August. Facilities including parking, toilets, and a cafe are available nearby.