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 Mimbeau is a protected lagoon-like inlet situated behind a natural sand spit at Cap Ferret in Arcachon, France. This shore-entry site is suitable for beginners, offering a sheltered environment for snorkelling among the moorings. Water temperatures range from 12C in winter to 22C in August, and visibility can reach up to 10 metres. While the site is generally calm, snorkelers should be aware of the potential for strong currents in the area. Facilities including parking and a cafe are available nearby for visitors.

Hortense is a multi-faceted site in Arcachon, France, featuring artificial riprap, sunken debris, and a drop-off. Located 300 metres from the shore, the site reaches depths between 4 and 25 metres. Entry is via an old boat slipway near the local restaurant. Conditions vary, with moderate currents, potential rip currents, and surf, making it suitable for intermediate divers. Snorkellers can explore the shallower rocky areas, particularly during slack tide. Species recorded around this area include European Common Cuttlefish, Common Octopus, Marbled Electric Ray, Gray Seal, various wrasses, scorpionfish, Conger Eel, crabs, Tompot Blenny, Barrel Jellyfish, Spiny Spider Crab, brittle stars, and sea stars.

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.

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.

La Vigne is a shallow marine dive site located in Arcachon, France. Suitable for beginners, the site offers depths ranging from 3 to 8 metres. Divers can access the water via both shore and boat entries. Conditions are generally manageable, with mild currents and visibility typically between 5 and 10 metres. Water temperatures fluctuate throughout the year, ranging from 12C in the winter months to 21C during August. The site provides a straightforward environment for those looking to gain experience in a coastal setting.

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.

Le Caméléon is a wreck site located off the coast of Cap Ferret, France, serving as an artificial reef. The site sits at depths between 22 and 26 metres, with an average depth of 23 metres. Divers access the wreck by boat, as it lies approximately 19 kilometres from shore. Conditions include a moderate current and visibility consistently around 5 metres, making a torch useful for exploring the structure. Water temperatures fluctuate between 12 and 18 degrees Celsius throughout the year. Due to the depth and current, this site is suitable for intermediate divers. Species recorded around this area include European Common Cuttlefish, Common Octopus, Conger Eel, and various crabs.