Bonaventure Island, located off the coast of Perce, offers snorkelers access to stony reefs, walls, and drop-offs. Situated 3500 metres from the shore, this site requires boat access to reach the sheltered coves and areas surrounding the island dock. The environment is characterised by cold water, with temperatures fluctuating between -1C and 17C throughout the year. Due to the significant temperature range and potential for boat traffic, this site is best suited for intermediate snorkelers. Facilities at the location include toilets. Snorkelers should be prepared for cold water conditions and remain vigilant regarding vessel activity in the area.

La Pierre Carrée is a shallow reef and artificial reef site located 3500 metres off the coast of Perce, Canada. Situated between the main island and the Le Cornu rock formation, this site features a natural pool with depths ranging from 3 to 5 metres, averaging 4 metres. The site is accessible only by boat and experiences mild currents. Water temperatures fluctuate significantly throughout the year, ranging from -1C in late winter to 16C in August. Due to its shallow depth and calm conditions, the site is suitable for beginners and is highly rated for snorkelling. Local facilities include air fills, equipment rental, guided tours, and boat charters.

Roche Carree in Perce, Canada, features a shallow reef and wreck combination located 800 metres from shore. This site is accessible only by boat and is suitable for beginner divers. Conditions include a moderate current, requiring careful planning around tidal movements. Water temperatures are cold, ranging from -1°C to 16°C, with variations between the north and south sides of the site. A drysuit is recommended for all seasons. Equipment rental is available for those who require cold-water gear. Night diving is permitted, offering an alternative perspective of the underwater topography. Visibility at the site is variable, and divers should ensure their cold-water equipment is serviced prior to arrival.

Bilbo is a shallow reef site in Perce, Canada, suitable for beginner divers. The site features a reef at a depth of 2 to 3 metres, though a nearby wreck reaches 24 metres. Divers experience mild currents and visibility ranging from 5 to 10 metres. Due to the variable visibility, maintaining close proximity to a guide or team is advised. Water temperatures fluctuate significantly between -1 and 16 degrees Celsius throughout the year, necessitating careful selection of exposure protection. Divers should confirm entry logistics and facility availability with a local operator before visiting, as amenities at the site are not guaranteed.

Le Mur Noir, or The Black Wall, is a dramatic cliff-side site located on the eastern side of Bonaventure Island. This vertical wall experience is defined by a distinct white quartz vein running through the rock face. Snorkellers can explore the remains of a 1900s steam-sail shipwreck resting at the site. Access is by boat, and the site is suited for intermediate snorkellers. Water temperatures fluctuate significantly throughout the year, ranging from -1C in late winter to 17C in August. Due to the variable conditions and vertical nature of the terrain, this site requires careful planning and appropriate thermal protection.

Percé Reef, also known as Southwest Reef, is a submerged rocky formation located 800 metres southwest of Percé Rock. This site offers a distinct habitat away from the restricted zones near the rock. Divers and snorkellers should expect very cold water temperatures ranging from -1°C to 16°C, necessitating thick thermal protection. The site is accessible only by boat and features moderate currents. It is suitable for intermediate divers, with typical dives lasting around 45 minutes. Night diving is permitted. Species recorded around this area include Gray Seal, Harbor Seal, Common Lobster, wrasses, Brittle Star, Sea Star, Common Sea Star, Rock Crab, Orange Sea Cucumber, Sea Squirt, snail, and Dead Man's Fingers.

Pavillon des grandes marées in Perce, Canada, offers shore-entry diving across a reef and kelp forest environment. Divers can explore depths reaching 18 metres. Conditions at this site are variable, with moderate currents and water temperatures ranging from -2C to 10C throughout the year. Due to the nature of the environment, divers should be aware of potential hazards including boat traffic, cold water, entanglement, rip currents, and surf. The site is suitable for beginners and supports long dives of up to 150 minutes. Local facilities provide guided tours, air fills, and equipment rental to support diving activities.

Anse-à-Beaufils Beach in Perce is a shore-entry reef site known for its rocky bottom, which features colourful agates and jaspers. The site is suitable for beginners, though water temperatures are cold, ranging from -1°C in winter to 17°C in August. Divers and snorkellers should be aware of sharp coral present in the area. Species recorded around this area include Gray Seal, Harbor Seal, Common Lobster, wrasses, various sea stars, rock crab, brittle stars, Dead Man's Fingers, snails, and sea squirts. Facilities at the site include parking and a nearby cafe. The site is considered a local favourite for shore-entry snorkelling.