Guian is a dive site located in the St. Lawrence, featuring a combination of natural and artificial reef structures. The site is shallow, with depths ranging from 6 to 11 metres. Access is by boat only, and divers must be prepared for strong currents, which require careful planning around slack water. Visibility typically fluctuates between 5 and 15 metres. Due to water temperatures ranging from -1°C to 17°C, drysuits are necessary for most of the year. Divers should be aware of boat traffic in the area and must use a dive flag and surface marker buoy for all ascents.

Cap-d'Espoir Beach in Perce is a shore-entry site featuring rocky outcrops that support small marine communities. This location is suitable for beginners, though snorkelers should be aware of surf conditions. Water temperatures fluctuate significantly throughout the year, ranging from -1°C in winter to a maximum of 17°C in August. Facilities available at the site include parking, toilets, and a rinse station. Species recorded around this area include Gray Seal, Harbor Seal, Common Lobster, Sea Star, Brittle Star, Rock Crab, Common Sea Star, Sea Squirt, Dead Man's Fingers, and Snail.

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.

Miscou Lighthouse Beach is a rugged, windswept site located at the extreme tip of the Acadian Peninsula where the bay meets the Gulf of St. Lawrence. The site features rocky shallows that can be accessed from the shore. Conditions are challenging, with moderate currents and surf, and the water remains very cold throughout the year, reaching a maximum of approximately 17°C in August. Due to these environmental factors, this site is best suited for intermediate snorkellers. Facilities available at the location include parking, toilets, showers, and changing rooms.

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.

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.

Anse Chatouilleuse is a sheltered bay located on the northwest side of Bonaventure Island. The site features the Grotte à Bouddha, or Buddha Cave, and offers shallow depths ranging from 0 to 15 metres. Access to this location is by boat. It is suitable for beginners and provides a snorkel experience rated 4 out of 5. Water temperatures fluctuate significantly throughout the year, ranging from -1C in winter to 17C in August. Species recorded around this area include Gray Seal, Harbor Seal, Common Lobster, wrasses, Rock Crab, Common Sea Star, Brittle Star, Orange Sea Cucumber, Sea Squirt, snails, and Dead Man's Fingers.

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.