Bon Ami Rocks, located at the eastern tip of Dalhousie, features volcanic rock formations that create complex underwater topography. Snorkellers can explore crevices and kelp forests within this area. The site is accessed from the shore and is suitable for intermediate snorkellers. Water temperatures vary significantly throughout the year, ranging from -1C in winter months to 18C in July and August. Conditions at this site are variable, and visitors should be prepared for cold-water environments. The location is part of the Bay of Warmth, which generally provides clearer water conditions compared to other Atlantic coastal spots.

Dalhousie Wharf Rock Pile is an artificial reef formed by the massive rock foundation of the town wharf. This site is suitable for advanced divers due to the presence of boat traffic and the nature of the structure. Entry is possible from both shore and boat. Water temperatures fluctuate significantly throughout the year, ranging from -1C in winter to 18C in summer. Snorkellers should remain on the outer side of the rock pile to avoid active shipping lanes. Divers must exercise caution regarding sharp structures present at the site.

Eel River Bar Sandbar is a natural geographical feature separating the freshwater Eel River from the saltwater Chaleur Bay. This site offers a transition zone where brackish and marine environments meet. Divers and snorkellers can access the water from the shore, with parking available nearby. Conditions at this location are variable, with depths starting at one metre and currents ranging from moderate to strong. Due to the presence of deep water, rip currents, and surf, this site requires caution. It is suitable for beginners, though water temperatures fluctuate significantly throughout the year, ranging from -1C in winter to 18C in summer.

Eel River Bar is a natural sandbar in St. Lawrence and Quebec that separates fresh river water from the saltwater of Chaleur Bay. This site offers shore access for snorkelling, suitable for beginners. Water temperatures fluctuate significantly throughout the year, ranging from -1°C in winter months to 18°C during July and August. Due to local ocean currents, this area experiences some of the warmest saltwater on the Atlantic coast north of Virginia. Snorkellers should be aware of the presence of jellyfish in the water. On-site facilities include parking, toilets, and changing rooms to support visitors.

Charlo Beach is a long barrier sandbar located southeast of Dalhousie. This shallow site features a mix of sand and small stones, with depths ranging from 1 to 5 metres and an average depth of 3 metres. It is suitable for beginners and offers shore access. Conditions include mild currents and water temperatures that fluctuate significantly throughout the year, ranging from -1C in winter to 18C in summer. Facilities available at the site include parking, toilets, showers, changing rooms, and a cafe. The habitat supports a variety of temperate marine life, including various fish and invertebrates typical of the region.

Heron Island is a provincial reserve located in the St. Lawrence and Quebec region, accessible exclusively by boat. Snorkellers can explore the south side of the island, which is characterised by extensive clam beds and mussel bars. The site is rated 4/5 for snorkelling, though conditions vary significantly due to the presence of strong currents and surf. Water temperatures fluctuate throughout the year, ranging from -1C in the winter months to 18C during July and August. Due to the challenging water conditions, this site is best suited for intermediate-level snorkellers.

Brise Lame features a combination of natural and artificial reef structures, offering an underwater landscape that ranges from shallow hard-bottom areas to depths of 30 metres. With an average depth of 15 metres, this site is suited for intermediate divers. Entry is via the shore, and divers should expect mild currents and visibility between 5 and 15 metres. Due to the cold water temperatures, which range from -1C to 18C, a drysuit with appropriate undergarments is necessary. Divers must remain aware of boat traffic in the area and monitor for low visibility conditions, which can shift unpredictably during the typical 45-minute dive.

Brise Lame in Carleton-sur-Mer is a shore-entry site located along the Gaspe Peninsula. The breakwater creates a sheltered environment, making it a suitable location for beginners to snorkel. Conditions are generally mild, though water temperatures fluctuate significantly throughout the year, ranging from -1C in winter to 18C in July and August. Divers and snorkellers should be aware of the presence of jellyfish in the area. The site provides convenient infrastructure, including parking, toilets, and showers, with guided tours also available for those visiting the Baie des Chaleurs.