Plage du Belvédère on Entry Island offers a shallow reef environment suitable for beginners. Divers and snorkellers can explore a mix of sandy and rocky patches at depths ranging from 1 to 5 metres, with an average depth of 3 metres. The site is accessed directly from the shore and features mild currents. Water temperatures vary significantly throughout the year, ranging from -1°C in winter to 19°C in August. Facilities at the site include parking, toilets, and showers. Potential hazards include the presence of jellyfish and sea urchins. Typical dives last approximately 30 minutes.

L'Étang-des-Caps, also known as Red Cliffs, is located at the western tip of Entry Island. This site features dramatic red sandstone cliffs that extend into the marine environment, creating a complex topography of reefs, caves, and caverns. Snorkellers can explore these underwater structures from a shore entry. Conditions at this location vary, and users should be aware of potential hazards including overhead environments, surf, rip currents, and strong currents. Due to these environmental factors, the site is best suited for intermediate-level snorkellers. Water temperatures fluctuate significantly throughout the year, ranging from -1C in winter months to 19C in August. Parking is available for visitors.

Les Demoiselles is a wall dive site located at Entry Island, featuring the underwater extension of red clay and gypsum cliffs. The site is suitable for intermediate divers due to the presence of strong currents and potential surf conditions. Access is available via both shore and boat entries. Water temperatures fluctuate significantly throughout the year, ranging from -1C in late winter to 19C in August. Parking facilities are available for visitors. While the site offers opportunities for both diving and snorkelling, users should be prepared for the challenging current conditions characteristic of this location.

Parc de Gros-Cap, located on Cap-aux-Meules, offers a distinct coastal environment defined by dramatic red sandstone cliffs and accessible sea caves. The site features a combination of reef and cave topography, with shallow waters suitable for exploring underwater tunnels and rock formations. Access is via the shore, making it a convenient location for beginners. Divers and snorkellers should be aware of moderate currents and potential surf conditions. Water temperatures vary significantly throughout the year, ranging from -1°C in winter to 19°C in August, with warmer conditions occasionally found in local lagoons and bays during late summer.

Le Corps-Mort is a boat-access site located 14 kilometres offshore from Entry Island. The underwater topography is defined by a distinct mix of black basalt, green clay, and red sandstone. This site is suitable for advanced divers due to moderate currents and potential hazards including cold water, entanglement, low visibility, and surge. The environment supports a variety of temperate marine life and invertebrates typical of the region. Access requires a boat, and the site is also rated for snorkelling. Guided tours, air fills, and equipment rental are available for those planning a visit to this offshore location.

Belle Anse (Fatima) is a shore-entry snorkel site located in Cap-aux-Meules. The underwater terrain is defined by rugged, dramatic rock formations that mirror the site's distinctive red cliffs. Snorkellers can explore the cliff line, which features extensive kelp forests. Conditions vary, with water temperatures ranging from -1°C to 19°C throughout the year, though lagoons and bays may reach 18°C to 21°C during late August and September. This site is suited for intermediate snorkellers who are comfortable navigating coastal environments. Parking is available for visitors.

Plage du Port on Entry Island provides a sheltered shore entry point located just south of the main ferry pier. The site features a mix of sandy and rocky bottom topography, making it a practical location for beginners to practise snorkelling. Water temperatures are cold throughout the year, ranging from -1°C in winter to a summer peak of 19°C in August. Visitors should expect brisk conditions, with summer averages typically between 10°C and 18°C. On-site facilities include toilets and a cafe, providing convenient support for those accessing the water from the shore.

Entry Island Cliffs feature dramatic wall and reef topography located 12 kilometres from shore. This remote site is accessible by boat from Cap-aux-Meules. Snorkellers should be prepared for challenging conditions, as the area is subject to strong currents, rip currents, and surf. Water temperatures are cold, ranging from -1°C in winter to 19°C in August. Due to these environmental factors and the exposed nature of the cliffs, this site is recommended for advanced snorkellers only. Toilets are available for visitor use. The site is noted for its high cliffs and clear water conditions within the archipelago.