Grosses-Roches features a rocky seabed situated near the municipal pier and launching ramp on the Gaspé Peninsula. This site offers a transition between river and maritime ecosystems, presenting a mix of reef and wall topography. Depths range from 11 to 41 metres, making it suitable for intermediate divers. Access is via a shore entry. Facilities available at the site include parking, toilets, showers, changing rooms, a rinse station, air fills, a dive shop, and boat charter services. Given the water temperatures, which fluctuate between -1C and 14C throughout the year, cold water diving equipment is required.

Plage du Parc des Îles is a shallow artificial reef site located on the Gaspé Peninsula in Matane. The site features river-fed waters with an average depth of two metres, making it suitable for beginners. Divers and snorkellers can expect mild currents and visibility ranging from two to five metres. The water temperature is cold, peaking at 14°C in summer, and requires thermal protection. The habitat supports a variety of temperate marine life, including various fish and invertebrates typical of the region. Shore access is available, supported by facilities including parking, showers, and equipment rental.

Matane-sur-Mer Beach is a long, pebbly shoreline situated west of the Matane River mouth on the Gaspé Peninsula. Snorkeling is possible in the shallow, calmer areas near the shore, with depths typically ranging between 1 and 3 metres. The site is suitable for beginners, though conditions are challenging due to very cold water temperatures, which rarely exceed 15°C, and low visibility of 1 to 3 metres. Divers and snorkellers should be aware of hazards including surf, rip currents, and sea urchins. Access is via the shore, with parking facilities available nearby. Typical sessions last around 30 minutes.

Les Îlets, located on the Gaspé Peninsula, is a shore-access reef site suitable for intermediate divers and snorkellers. The site features rocky islets where a short swim from the shore leads to the north face. Divers should be prepared for cold water conditions, with temperatures ranging from -1C to 15C, and a dry suit is recommended. The site is subject to moderate currents, which can be a hazard. Facilities available at the location include parking, toilets, and showers. The habitat supports a variety of temperate marine life, including various fish and invertebrates typical of the region.

Rocher Cap-Chat is a reef site located on the Gaspé Peninsula, defined by the cat-shaped rock formation for which the town is named. Snorkellers can explore rocky ledges and kelp forests accessible directly from the shoreline trails near the lighthouse. The site is suitable for beginners, with depths ranging from 1 to 5 metres and an average depth of 3 metres. Currents are generally mild. Due to water temperatures ranging from -1C to 15C, thermal protection is necessary for all in-water activities. Facilities at the site include parking, toilets, showers, changing rooms, a rinse station, a cafe, first aid, a dive shop, and boat charter services.