Located on the Crozon Peninsula, Île Tristan is a protected island within the Iroise Marine Park. Divers and snorkellers access the rocky reef perimeter via a stone causeway at low tide. The site features moderate currents and visibility ranging from 5 to 15 metres. Water temperatures fluctuate between 11C and 16C throughout the year. The habitat supports a variety of temperate marine life, including reef fish and invertebrates typical of the region. Due to the presence of strong currents, surf, and potential entanglement hazards, this site is recommended for intermediate divers. It offers a rewarding experience for those comfortable with cold-water conditions.

Plage Saint-Jean on the Crozon Peninsula is a shore-entry reef site situated below a historic chapel and marine cemetery. The topography features a sandy strip flanked by rocky outcrops on either side. This site is suitable for beginners, with an average depth of 3 metres and a maximum depth of 5 metres. Conditions are variable, with visibility ranging from 2 to 5 metres and moderate currents. Divers and snorkellers should be aware of potential hazards including cold water, surf, rip currents, and low visibility. Facilities available at the site include parking, toilets, and showers.

Plage des Dames on the Crozon Peninsula is a sheltered shore-entry site suitable for beginners. The reef environment offers shallow depths ranging from 1 to 5 metres, with an average depth of 3 metres. Snorkellers can expect mild currents, though surge can occur depending on conditions. Visibility is variable, typically starting from 3 metres. The site is easily accessible with local facilities including parking, toilets, and showers. It is a convenient location for those looking to practice in a controlled, near-shore environment. Typical sessions last around 30 minutes.

Ar Gorred, situated at the foot of the Plomarc'h natural site on the Crozon Peninsula, offers a tranquil environment for snorkelling. The site features a combination of shallow rocky reef beds and seagrass patches, providing a varied habitat for local marine life. Divers and snorkellers can expect to encounter typical temperate marine species associated with these coastal environments, including various invertebrates and small fish. Access is via the shore, with parking available nearby. The water temperature ranges from 11C to 16C throughout the year, making it a site best suited for those prepared for cooler conditions. It is an accessible location for beginners looking to explore the coastal biodiversity of Brittany.

Castel Meur is a reef dive site located on the Crozon Peninsula in France. This shore entry dive is suited for intermediate divers, with an average depth of 16 metres. Divers should be aware of moderate currents and potential surf conditions at the site. Visibility typically ranges between 5 and 15 metres. Water temperatures are generally cold, ranging from 11°C to 15°C throughout the year, though they may reach up to 18°C during the warmest periods. A typical dive at this location lasts approximately 30 minutes.

La Perle is a wreck dive site situated off the Crozon Peninsula in France. The wreck lies at a consistent depth of 16 metres. Access to the site is by boat only. Divers should be prepared for moderate currents and visibility that typically ranges between 2 and 10 metres. Water temperatures are cool, fluctuating between 11C and 14C throughout the year. Due to the nature of the site, it is suited for intermediate divers. Hazards at this location include potential boat traffic and the risk of entanglement on the wreck structure.

La Meuse is a wreck dive located off the Crozon Peninsula in France. This site is suitable for intermediate divers and requires boat access. The wreck lies at depths ranging from 22 to 33 metres, with an average depth of 27 metres. Divers can expect mild currents and visibility between 5 and 10 metres. Water temperatures remain cool throughout the year, typically between 11 and 13 degrees Celsius. A standard dive at this location lasts approximately 40 minutes. Due to the nature of the area, divers should remain aware of boat traffic. Guided tours are available through local dive shops.

Pors Lanvers on the Crozon Peninsula offers a reef environment characterised by a landscape of boulders and sandy clearings. Accessible from the shore, the site reaches depths between 5 and 38 metres, with an average depth of 15 metres. Snorkellers should be prepared for moderate currents and variable visibility. Given the water temperatures ranging from 11 to 16 degrees Celsius, a 5 to 7mm wetsuit is recommended. The site is suitable for intermediate snorkellers. Hazards include boat traffic and cold water. Facilities available at the site include parking, showers, toilets, and a rinse station.