Anse du Brick is a sheltered rocky cove located on the northern coast of the Cotentin Peninsula near Cherbourg. This site features shallow rocky reefs accessible directly from the shore, making it suitable for beginners. Depths start at 2 metres and vary across the reef. Water temperatures fluctuate between 10C and 18C throughout the year, requiring appropriate thermal protection. Divers and snorkellers should be aware of potential rip currents and the cold water conditions. Facilities at the site include parking and a cafe for visitor convenience.

Fort de Chavagnac is an offshore 19th-century fort located 3000 metres from the shore near Cherbourg. The site features artificial rocky foundations that function as an artificial reef, attracting interest from divers and snorkellers. Diving depths range from 4 to 14 metres. Access to the site is by boat only, and guided tours are available. Conditions include moderate currents, though divers should be aware of the potential for strong currents in the area. Water temperatures fluctuate between 10C and 18C throughout the year. The site is suitable for intermediate divers and offers a 4/5 rating for snorkelling.

Brittany & Normandy Wreck is a shore-accessible site featuring a combination of wreck structure and reef terrain. Divers can explore depths ranging from 5 to 25 metres, with an average depth of 15 metres. Conditions are variable, with visibility between 3 and 15 metres and water temperatures ranging from 9C to 15C. The site is subject to strong currents, surf, and boat traffic, requiring careful planning around slack water. Due to the potential for entanglement within the wreck structure, divers should carry a cutting tool and a surface marker buoy. A drysuit or thick wetsuit is recommended for this environment.

Landemer Cliffs near Cherbourg offers dramatic underwater topography defined by Green Siltite rock formations. This site features both reef and wall structures, reflecting the strong influence of the Atlantic. Snorkellers should be aware that this is an advanced site due to challenging conditions, including surf, rip currents, and strong currents. Water temperatures range from 10C in the winter to 18C in late summer. Access is via the shore, starting from the Sentier des Douaniers. Given the exposure to open water and variable currents, this location is best suited for experienced snorkellers comfortable with cold water and dynamic marine environments.

Île Tatihou, located near Cherbourg, France, offers snorkeling opportunities around its rocky coastline. The site is particularly noted for the rocky areas surrounding the Vauban tower, a UNESCO-listed structure that provides a habitat for various marine organisms. Water temperatures at this site vary between 9C and 18C throughout the year. Access to the water is possible via both shore and boat entries. This location is suitable for beginners, with a snorkel rating of 3 out of 5. Divers and snorkellers should be prepared for the temperate water conditions characteristic of this region.

The Leopoldville is a technical wreck dive located off the coast of Cherbourg, France. Resting at depths between 38 and 65 metres, this site is reserved for advanced divers. Access is strictly by boat, and the site is characterised by strong, unpredictable currents. Divers must navigate an overhead environment with significant entanglement risks. Visibility typically ranges from 5 to 15 metres, and water temperatures remain cold, between 9 and 13 degrees Celsius. A drysuit is essential for this dive, and careful gas management is required due to the depth and conditions. Divers should plan their entry around slack water and consult with their charter skipper regarding current conditions.

Port du Hable in Cherbourg, France, is a rocky reef site accessible from the shore. The topography is defined by large boulders and deep gullies that offer shelter for various marine life. Snorkellers can observe common species including sea hares, European green crabs, and snails. Less frequently encountered inhabitants include conger eels, spiny spider crabs, rock crabs, sea stars, brittle stars, sea squirts, and shannies. Water temperatures at this site fluctuate between 10C and 18C throughout the year. Due to the nature of the terrain, this site is best suited for intermediate-level snorkellers.

Port Racine, recognised as the smallest port in France, provides a sheltered shore entry into the rocky waters of the Hague. The site features a combination of natural reef and artificial structures, with kelp-covered rocks dominating the underwater topography. Conditions are generally mild, making this an accessible location for beginners. Species recorded around this area include conger eels, sea hares, various crab species such as spiny spider crabs and rock crabs, sea stars, snails, sea squirts, and shannies. Parking is available for visitors. Water temperatures fluctuate between 10C and 18C throughout the year, requiring appropriate thermal protection for snorkellers.