Plage de Yeyew on the south coast of Belle-Île-en-Mer offers a rugged underwater topography featuring crevices and small caves. This site is suitable for intermediate snorkellers, with depths ranging from 3 to 18 metres and an average depth of 10 metres. Access is via the shore, and the site is characterised by mild currents and visibility between 5 and 15 metres. Water temperatures fluctuate significantly throughout the year, ranging from 10C in winter to 19C in August. Divers and snorkellers should be aware of potential surf conditions at this location. Parking facilities are available near the site.

Port Goulphar is a narrow inlet located on the wild coast of Belle-Île-en-Mer, France, near the Aiguilles de Port Coton. This reef site offers a sheltered entry point for snorkellers when sea conditions are calm. The site features an average depth of 4 metres, with a range between 3 and 5 metres. Access is via the shore, and parking is available nearby. Due to the presence of surf and moderate currents, this site is recommended for intermediate snorkellers. Water temperatures fluctuate throughout the year, ranging from 10C in winter to 19C in August.

Plage de Bordardoué on Belle-Île-en-Mer is a shore-entry site featuring rocky reef formations. Located near Le Palais, the beach is suitable for beginners interested in snorkelling. The topography includes rocky areas on the left side of the beach, which are accessible for observing intertidal life. Water temperatures remain cool throughout the year, ranging from 10C in winter to 19C in August. Divers and snorkellers should be aware of moderate currents and surf conditions. Parking facilities are available for visitors. This site provides a straightforward entry point for those exploring the coastal geology of the Morbihan Islands.

Grève des Curés on Belle-Île-en-Mer is a reef site characterised by a maze of rocky islets. This shore entry location is suitable for intermediate divers and offers a high-quality snorkelling experience. Conditions are generally cool to cold, with water temperatures ranging from 10°C in winter to 19°C in August. While currents are typically mild, divers should be aware of the potential for strong currents in the area. The site features a white sand bottom and rocky topography that provides a sheltered environment for exploration in calm conditions.

Port Jean is a narrow, rocky cove located on the north coast of Belle-Île-en-Mer, France. This site offers protection from most winds, making it a suitable location for beginners. Divers and snorkellers can explore the rocky edges at depths ranging from 2 to 8 metres, with an average depth of 5 metres. Access is via the shore, and conditions include mild currents and visibility between 3 and 10 metres. Water temperatures fluctuate between 10C and 18C throughout the year, though the water can feel warmer at high tide. Facilities available at the site include parking, showers, and toilets. Typical dives last approximately 45 minutes.

Plage de Port Fouquet is a wide, deep cove situated on Belle-Île-en-Mer. The site features a flat sandy bottom that transitions into rocky reefs along the sides, interspersed with areas of seagrass. With depths ranging from 1 to 8 metres and an average of 4 metres, it is well-suited for beginners. Snorkellers can expect mild currents and visibility typically between 5 and 15 metres. Access is via the shore, and the site is equipped with parking, showers, and toilets. The location provides a sheltered environment for exploring the varied underwater topography of the Morbihan Islands.

Crique de Deuborh is a reef site located on Belle-Île-en-Mer, France. This shore-entry location features a rocky plateau on the right side of the beach. The site is suitable for beginners and offers mild currents, making it a popular choice for local dive schools. Water temperatures are cool, ranging from 10C in winter to 19C in August. Facilities available at the site include parking, showers, and toilets. Snorkelling is also well-regarded here, with a rating of 4 out of 5.

Ster Vraz is a deep, fjord-like inlet situated on the Côte Sauvage of Belle-Île-en-Mer. This site features impressive underwater drop-offs, reefs, and caves. Access is via the shore, and the site is suited for advanced divers due to the presence of rip currents and surf. Water temperatures are cool, ranging from 10°C in winter to 19°C in August, necessitating the use of a wetsuit. Facilities at the site include parking, toilets, and showers. While the site offers a challenging environment for divers, it is also rated for snorkelling.