Dune du Sud, located on Havre-aux-Maisons Island near Cap-aux-Meules, offers accessible sea caves carved into red rock formations. This site is suitable for beginners, with depths ranging from 1 to 5 metres and an average depth of 3 metres. Snorkellers can access the caves directly from the shore. Conditions vary, with visibility typically between 3 and 10 metres and mild currents. Water temperatures are cold, fluctuating between -1C and 19C throughout the year, and the site is noted as being cold for swimming even in September. Hazards include surf and sharp rock formations. Facilities at the site include parking and toilets.

La Bluff in Cap-aux-Meules offers a distinct snorkeling experience defined by dramatic red sandstone cliffs and accessible sea caves. Snorkelers can navigate through narrow passages and chambers carved into the rock by the Gulf of St. Lawrence. The site features both cave and reef topography, requiring intermediate skill due to the presence of overhead environments, surf, and surge. Water temperatures fluctuate significantly throughout the year, ranging from -1C in winter to 18C in August. Guided tours are available through local dive shops to assist with shore entries. The habitat supports a variety of temperate marine life, including various fish and invertebrates typical of the region.

Boudreau Island Peninsula near Cap-aux-Meules offers diverse snorkeling environments across its coastal geography. The Bassin aux Huîtres side provides shallow, calmer, and warmer conditions, while the seaward side features rugged cliffs and deeper water for exploration. This site consists of both natural reef and artificial reef structures. Access is via shore entry. Snorkelers should be prepared for moderate currents and potential surf. Due to the presence of sharp coral and strong currents, this site is recommended for intermediate snorkelers. Water temperatures fluctuate significantly throughout the year, ranging from -1C in winter months to 18C in August.

Bassin aux Huîtres is a shallow, calm bay situated between the main island and Île Boudreau. This site offers a sheltered environment away from open ocean waves, making it suitable for beginners. The topography consists of reef and seagrass habitats, which support a variety of temperate marine life and invertebrates typical of the region. Access is via the shore, and conditions are generally characterised by mild currents. Water temperatures fluctuate significantly throughout the year, ranging from -1C in late winter to 18C in August. Snorkellers should be prepared for these variable conditions when planning their visit to this coastal location.

Grande-Entrée Harbor Mouth, located near the fishing port of Grande-Entree, offers a combination of natural reef and artificial reef structures. This site is suited for advanced divers due to the presence of active boat traffic. Water temperatures fluctuate significantly throughout the year, ranging from -1C in winter to 18C in August. Divers and snorkellers can expect to encounter a variety of temperate marine life typical of the region, including various fish and invertebrates that inhabit these reef environments. Access to the site is available via both shore and boat entries. Snorkelling is possible here, though conditions vary based on the active maritime environment.

Cap Alright is situated below the lighthouse in Cap-aux-Meules, Canada. The site is defined by its grey cliffs and a rocky seabed. Due to the nature of the local waters, which are considered dangerous, this location is suitable only for advanced snorkellers. Snorkelling should be attempted exclusively on extremely calm days. Water temperatures at this site fluctuate significantly throughout the year, ranging from a low of -1C in February and March to a high of 19C in August. Access to the water is via the shore.

Petite-Baie in Cap-aux-Meules offers a calm, shallow environment suitable for beginner snorkellers. The site features a sandy and silty bottom with an average depth of 3 metres, ranging between 1 and 5 metres. Access is via the shore, and conditions are generally mild with low currents. Due to the nature of the seabed, visibility can be low. Water temperatures fluctuate significantly throughout the year, peaking at 19°C in August, with sheltered areas occasionally reaching 20°C. Facilities at the site include parking, equipment rental, and a cafe.

Pointe-Basse Harbour Rocks in Cap-aux-Meules offers a rugged shore entry near a traditional fishing wharf. The site features a combination of natural rock formations and a breakwater, creating a distinct underwater environment. Divers should expect moderate currents and be aware of boat traffic and surf conditions. Water temperatures are cool, ranging from -1C to 19C throughout the year, with August typically being the warmest month. The site is suitable for intermediate divers, and parking is available for convenience. Snorkelling is also possible at this location, which provides a view of the local cold-water ecosystem.