The Walter is a wreck dive located off Saint-Malo, resting at depths between 30 and 38 metres. This site is suited for intermediate divers who possess both Open Water and wreck qualifications. Divers access the wreck by boat, encountering moderate currents that can strengthen during ascent and descent. Visibility typically ranges from 5 to 10 metres, requiring careful navigation around the structure. Water temperatures are cold, fluctuating between 9 and 15 degrees Celsius throughout the year, necessitating appropriate thermal protection. Due to the depth and potential for entanglement in wreckage components, precise buoyancy control and the use of a cutting tool are essential safety practices for all visitors.

Les Jardins de la Conchée is a boat-access site situated 4000 metres from the shore of Saint-Malo. The underwater topography features a complex environment of granite boulders and kelp gardens, alongside a wall, drop-off, and artificial reef structures. Divers can explore a wreck located within the site. Depths range from 4 to 25 metres, with an average depth of 20 metres. Conditions are variable, characterised by strong currents, surge, and surf, which require careful planning. Hazards include potential entanglement, boat traffic, and low visibility. This site is suitable for beginners, though the challenging currents necessitate caution.

Le Fetlar is a reef dive located off the coast of Saint-Malo, France. The site features a seabed ranging from 17 to 28 metres in depth. Divers should expect moderate currents throughout the area, requiring the ability to fin against the flow in short bursts. Visibility at the site typically ranges between 5 and 10 metres. Due to water temperatures fluctuating between 9 and 16 degrees Celsius, a 7mm wetsuit or a drysuit is recommended for comfort. Access to this site is exclusively by boat. It is suitable for divers seeking an introduction to temperate reef environments.

Havre de Rothéneuf is a protected natural harbour in Saint-Malo, offering a sheltered environment that remains calm even when conditions in the open sea are rough. The site features a sandy bottom interspersed with rocky patches, making it a suitable location for beginners and families to snorkel from the shore. Water temperatures vary seasonally, ranging from 9C in February to 19C in August and September. Facilities available at the site include toilets and a rinse station. Species recorded around this area include European Common Cuttlefish, catsharks, sea slugs, squat lobsters, wrasses, conger eels, common lobsters, spiny spider crabs, and various sea stars.

Located 3500 metres from the coast of Saint-Malo, the South Beach of Île de Cézembre is a reef site accessible only by boat. The area features rocky outcroppings and shallow waters ranging from 2 to 8 metres, with an average depth of 5 metres. This site is suitable for beginners and offers a snorkel rating of 4 out of 5. Divers and snorkellers should be aware of moderate currents and boat traffic in the vicinity. Water temperatures fluctuate between 9C in February and 18C in August and September. Facilities on the island include a cafe and toilets.

The M4600 is a wreck dive located off the coast of Saint-Malo, France, resting at depths between 20 and 28 metres. This site is accessible by boat and is suitable for beginner divers, though it requires careful planning around tidal windows due to moderate currents. Visibility typically ranges from 5 to 10 metres. Divers should be aware of entanglement risks and overhead environments associated with the wreck structure. Water temperatures fluctuate significantly throughout the year, ranging from 9 to 19 degrees Celsius, making drysuits or thick wetsuits advisable outside of the summer months. Always confirm tidal conditions with your boat operator before descending.

Les Buharats is a reef dive located off the coast of Saint-Malo, France, suitable for beginner divers. The site features a reef structure at depths ranging from 10 to 20 metres. Divers should expect moderate currents and variable visibility between 10 and 30 metres. Access is by boat only to avoid surf and shore break. Water temperatures fluctuate between 9C and 16C throughout the year, requiring appropriate thermal protection. Divers should maintain careful buoyancy to avoid sharp rocks and sea urchins present near the reef structure. Shore facilities including changing rooms, showers, and a rinse station are available for post-dive use.

Petit Bé is a reef site located 400 metres from the shore near Saint-Malo. This site features deep gullies between rocks and is suitable for intermediate snorkellers. Depths range from 2 to 10 metres, with an average of 6 metres. Conditions are variable, with visibility between 3 and 10 metres and strong currents present. Water temperatures fluctuate throughout the year, ranging from 9C in February to 19C in August and September. Access is via the shore, and the site offers nearby facilities including parking, toilets, showers, and a dive shop. Typical snorkelling sessions last approximately 45 minutes.