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.

Plage de la Cible in Arcachon Bay offers a shallow reef environment suitable for beginners. The site features a long pontoon and submerged rocky structures that are best explored at high tide when the water covers the oyster-encrusted rocks. Depths range from 1 to 10 metres, with an average of 5 metres. Access is via the shore, and facilities including parking, toilets, and showers are available nearby. Divers and snorkellers should be aware of potential hazards, including surf and sharp oyster-encrusted rocks. Water temperatures fluctuate between 10C and 20C throughout the year.

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.

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.

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.

The Cristina Rueda is a shallow wreck located 1600 metres offshore in Arcachon Bay, France. Resting at an average depth of 8 metres, with a range of 6 to 10 metres, this site is suitable for beginner divers. Access is by boat only, and the site features mild currents with visibility typically between 5 and 10 metres. Divers should remain aware of the wreck structure to avoid entanglement hazards. Water temperatures fluctuate between 10C and 19C throughout the year. Local facilities provide air fills, equipment rental, and guided tours to assist with navigating the wreck layout.

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.

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.