Bond Head Park, located east of Bowmanville, offers shore access for snorkelling via a small beach area and boat launch. The site is characterised by artificial armour stone structures installed for shoreline protection. These rocky features provide habitat for small fish and crustaceans. Water temperatures at this location vary significantly throughout the year, ranging from 3C in February to 21C in August. Due to the nature of the environment and entry, this site is best suited for intermediate snorkellers. Conditions can be variable, and visitors should exercise caution when navigating the rocky shoreline and boat launch areas.

Darlington Provincial Park Main Beach offers a freshwater shore dive along the shores of Lake Ontario. The site features a sandy beach with rocky bottom structures located near the eastern and western bluffs. Divers can expect depths ranging from 2 to 8 metres, with an average depth of 5 metres. Conditions include moderate currents and visibility typically between 5 and 15 metres. Due to water temperatures ranging from 3C to 17C, a wetsuit is recommended. The site is suitable for beginners, with typical dives lasting around 45 minutes. Hazards include cold water and surf. Facilities available at the park include parking, toilets, showers, changing rooms, and a rinse station.

Lakeview Park Beach in the Niagara Peninsula offers a sandy shore entry into Lake Ontario. This site is suitable for beginners, with depths ranging from 1 to 5 metres and an average depth of 3 metres. Snorkellers should be aware of moderate currents, surf, and the potential for low visibility, which typically fluctuates between 2 and 8 metres. Water temperatures vary significantly throughout the year, ranging from 4C to 21C, with comfortable conditions for swimming and snorkelling generally limited to the summer months between July and September. Facilities at the beach include parking, toilets, showers, a rinse station, and first aid services.

Kiwanis Heydenshore Park offers a shore entry from a pebbly beach, leading to a rocky bottom that functions as both a natural and artificial reef. This site is suitable for beginners, though divers must navigate mild currents and potential hazards including boat traffic, entanglement, and low visibility. Water temperatures fluctuate significantly throughout the year, ranging from 4°C in winter to 21°C in August, presenting a risk of hypothermia. Species recorded around this area include snails, alewife, brown bullhead, round goby, common carp, white sucker, pike, common perch, rainbow trout, and trout. Facilities at the park include parking, toilets, showers, changing rooms, a rinse station, and a cafe.

Rotary Sunrise Lake Park at Lighthouse Point offers shore access to a rocky substrate near the Port Whitby pier. This site provides depths ranging from 2 to 10 metres, with an average of 6 metres. Visibility typically varies between 3 and 10 metres, often exceeding that of nearby sandy beaches due to the rocky bottom. The site is suitable for beginners, though snorkellers should remain aware of local boat traffic. Species recorded around this area include alewife, snails, common carp, brown bullhead, round goby, common perch, rainbow trout, pike, trout, and white sucker. Facilities at the park include parking, toilets, showers, and changing rooms.

Iroquois Beach is a freshwater site located on the Niagara Peninsula. The shoreline features rocky entry points that distinguish it from sandy beaches in the area. Snorkellers can access the water directly from the shore, though conditions vary and users should be aware of strong currents. Water temperatures fluctuate significantly throughout the year, ranging from 4C in the winter months to a peak of 21C in August. Parking is available for visitors. This site is suitable for beginners, though it is rated 2/5 for snorkelling activity. Due to the nature of the environment, visitors should exercise caution regarding water conditions.

Lynde Shores Conservation Area offers a shallow freshwater snorkelling experience where Lynde Creek meets Lake Ontario. The site features a reef-like environment with depths ranging from 1 to 5 metres, averaging 3 metres. Entry is via the shore, with the primary area located approximately 10 metres from the shoreline. Conditions are variable, with visibility typically between 2 and 6 metres and mild currents. Water temperatures fluctuate significantly throughout the year, ranging from 4C in winter to 21C in August. Due to the cold water and low visibility, this site is best suited for beginners who are prepared for freshwater conditions. Typical sessions last around 30 minutes.

Carruthers Marsh is a freshwater site located on the eastern edge of Ajax, where the marsh meets the lake. The underwater terrain consists of a mix of silt and clay, featuring patches of aquatic vegetation. Snorkellers should be aware of the variable conditions, including low visibility, potential surf, and rip currents. Due to the cold water temperatures, which range from 4C to 21C throughout the year, the swimming season is limited to July through September. The site is accessible via a shore entry and is suitable for beginners, though caution regarding entanglement and cold water is advised. Facilities including parking, toilets, and a cafe are available nearby.