Bluffer's Park in Scarborough offers a freshwater snorkeling experience featuring a sandy beach and man-made stone berms. The underwater topography consists of sandy ridges and large boulders, which provide habitat for various temperate freshwater fish and invertebrates. Access is via the shore, and conditions generally feature mild currents. Water temperatures fluctuate significantly throughout the year, ranging from 4C in winter to 22C in August. The site is suitable for beginners, though snorkelers should be prepared for cold water temperatures outside of the peak summer months. Facilities available at the park include parking, toilets, showers, changing rooms, a rinse station, and a cafe.

Guild Park offers a unique freshwater snorkelling experience along a rocky shoreline. The site features an artificial reef created by historical erosion control efforts, consisting of large concrete slabs and stone debris scattered underwater. Access is via a trail at the end of Galloway Road, requiring a shore entry. Due to the nature of the submerged structures, this site is suited for advanced snorkellers. Water temperatures fluctuate significantly throughout the year, ranging from 4C in winter to 22C in August. Divers and snorkellers should be aware of potential hazards including entanglement and sharp debris. Parking is available for visitors.

East Point on the Niagara Peninsula offers a rugged freshwater snorkelling experience along a shoreline composed of sand and cobble. The site is characterised by submerged glacial rocks that create a distinct topography compared to nearby sandy beaches. Snorkellers can expect depths ranging from 1 to 5 metres, with an average depth of 3 metres. Access is via a shore entry, and conditions include mild currents and visibility between 1 and 5 metres. Due to the potential for surf and cold water temperatures, which fluctuate between 4C and 22C throughout the year, this site is best suited for intermediate-level snorkellers. Facilities at the location include parking, toilets, showers, and changing rooms.

Port Union in the Niagara Peninsula features extensive stone breakwaters that function as artificial reefs. These structures, composed of large armour stone, provide complex topography for exploration. The site is accessed from the shore and is suitable for intermediate snorkelers. Depths range from 2 to 6 metres, with an average of 3 metres. Conditions include mild currents and visibility typically between 4 and 5 metres. Hazards at this freshwater location include cold water, surf, and surge. Facilities at the park include parking and toilets. Snorkelers should be prepared for variable water temperatures, which fluctuate from 4C in winter to 22C in August.

Rouge Beach is located where the Rouge River meets Lake Ontario, providing a transition between marsh and lake environments. Snorkelers can explore the sandy channel and the edge of the marsh vegetation. This site is suitable for beginners and offers shore access. Water temperatures fluctuate significantly throughout the year, ranging from 4C in winter to 22C in August. Divers and snorkelers should be aware of moderate currents and potential rip currents. Cold water temperatures during spring and autumn pose a risk of hypothermia, particularly in April when temperatures average 3.7C. Parking and toilets are available at the site.

Petticoat Creek offers a rugged snorkeling experience situated below scenic bluffs. The shoreline is characterised by rocky terrain, providing structure and crevices that differ from nearby sandy beaches. This site is suitable for intermediate snorkelers and requires a shore entry. Conditions vary, with visibility typically ranging between 3 and 6 metres and water temperatures fluctuating from 4C to 22C throughout the year. Be aware of potential hazards including boat traffic, surf, and cold water. Species recorded around this area include Alewife, Common Carp, Blue Gill, Sun Perch, Common Perch, Trout, Round Goby, Brown Bullhead, American Crayfish, Pike, White Sucker, and Small Mouth Bass.

Rotary Frenchman's Bay West Park, located on the southwest shore of Frenchman's Bay, provides a sheltered freshwater environment suitable for beginner snorkellers. The site features a sandy, shallow entry point leading to depths ranging from 1 to 5 metres, with an average depth of 3 metres. Conditions are generally mild, though water temperatures fluctuate significantly throughout the year, ranging from 4C to 21C. The area is well-supported by facilities including parking, toilets, showers, changing rooms, and a rinse station. Visitors can also access a nearby cafe, dive shop, and guided tour services. Typical snorkelling sessions last approximately 45 minutes.

Beachfront Park in Pickering provides a shore entry into the freshwater environment of Lake Ontario. The site features a mix of sandy and rocky bottom topography that can shift following storm activity. Suitable for beginners, this location offers mild currents, though conditions vary significantly. Water temperatures are cold, fluctuating between 4C and 21C throughout the year. Snorkellers and divers should remain cautious of hazards including cold water, low visibility, surf, and rip currents. The park is well-equipped with amenities such as parking, toilets, showers, changing rooms, a rinse station, and an on-site cafe, with a dive shop located nearby for equipment and support.