Baie de Cayola is a rugged, steep bay located in Arcachon Bay, France. The site features a shingle and rock seabed, providing a distinct underwater topography for divers and snorkellers. Access is via the shore, though divers should be aware of potential surf conditions. Water temperatures vary throughout the year, ranging from 10C in winter to 20C in August. Species recorded around this area include crabs, sea hares, shrimp, brittle stars, sea stars, snails, clingfish, and rockpool prawns. Facilities available at the site include parking, toilets, showers, changing rooms, a rinse station, and a cafe.

Le Nouch is a reef site located within Arcachon Bay, France. This marine environment is accessible exclusively by boat. Divers can expect depths ranging from 3 to 13 metres. Conditions at this site vary, with water temperatures fluctuating between 10C in the winter months and 18C during the summer. Due to the nature of the site and local conditions, it is best suited for intermediate divers. There is no specific data available regarding the marine life present at this location.

La Jean Marthe is a wreck dive site located 300 metres from the shore in Arcachon Bay, France. The site is suitable for beginners and offers a consistent depth of approximately 8 metres. Access to the wreck is by boat only. Divers should remain aware of boat traffic in the area during their dives, which typically last around 40 minutes. Water temperatures at this site fluctuate throughout the year, ranging from 10C in the winter months to 19C in August. As a wreck site, it provides a specific structure for exploration within the marine environment of the Atlantic Coast.

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.

Phare de l'Armandèche is a shore-entry dive site located on the Atlantic Coast of France. The topography consists of a rocky shelf featuring gullies and kelp forests. Divers can expect depths ranging from 3 to 11 metres, with an average depth of 7 metres. Conditions are variable, with moderate currents and potential surf, making this site suitable for intermediate divers. Typical dive times are approximately 45 minutes. Due to the presence of kelp, divers should be aware of potential entanglement hazards. The site is also well-regarded for snorkelling, holding a rating of 4 out of 5.

Conche des Baleines, also known as Lighthouse Rocks, is located at the western tip of the beach near the Phare des Baleines. The site is characterised by rugged limestone formations, including tide pools and submerged ledges. This shore-entry location is suitable for beginners and offers a snorkel rating of 3 out of 5. Water temperatures at this Atlantic Coast site vary throughout the year, ranging from 10C in the winter months to 20C during the peak summer period of July and August. Divers and snorkellers should be prepared for these seasonal fluctuations in temperature when planning their visit to this coastal area.

Bassin Dombret is a natural seawater pool situated along the rocky coastline of La Chaume in Arcachon Bay. This site provides a wave-free environment, making it suitable for beginners to practice snorkelling. Water temperatures fluctuate throughout the year, ranging from 10C in winter to 20C in August. Species recorded around this area include crabs, sea hares, shrimp, sea stars, brittle stars, snails, European green crabs, clingfish, and rockpool prawns. Access is via the shore, and the site is particularly useful for observing small marine life trapped by the tide.

Plage de la Paracou is a rocky cove situated at the western end of Les Sables-d'Olonne. This site is suitable for beginners, offering shallow snorkelling in depths ranging from 0 to 3 metres, with an average depth of 1 metre. Access is via the shore, where mild currents and visibility between 2 and 8 metres are typical. At low tide, the area features natural rock pools. Visitors should be aware of potential hazards including sharp coral and surf. Facilities available at the site include parking, showers, and first aid. The water temperature fluctuates between 10C and 20C throughout the year.