Gull Island near Kingston offers a rugged freshwater snorkeling experience featuring extensive rocky reefs. Access to the site is restricted until after September 10th each year due to bird nesting activity. Water temperatures fluctuate significantly throughout the year, ranging from 2C in March to 22C in August. Due to the potential for surf and boat traffic, this site is suited for advanced snorkelers. Entry is possible from both shore and boat. On-site facilities include parking, toilets, showers, changing rooms, a cafe, and access to guided tours or boat charters.

High Bluff Waterfront in Kingston offers a distinct freshwater dive experience characterised by a dramatic drop-off. The underwater topography consists of large boulders and smooth rock slabs, creating a complex environment for exploration. This site is suitable for intermediate divers due to moderate currents and potential hazards including cold water, entanglement risks, and surge. Shore access is available, and the site is well-supported by facilities such as parking, toilets, showers, and changing rooms. Snorkellers will also find this location suitable. Water temperatures fluctuate significantly throughout the year, ranging from 2C in March to 22C in August.

Rocky Beach in Kingston is a freshwater site featuring a flat limestone shelf that extends into Lake Ontario. This location is suitable for beginner snorkellers, with depths ranging from 1 to 5 metres and an average depth of 3 metres. The site is accessed via a shore entry. Conditions can vary, with potential hazards including low visibility, strong currents, and surf. Water temperatures fluctuate significantly throughout the year, ranging from 2°C in March to 22°C in August. The area is known for fossil snorkelling, allowing visitors to observe ancient marine life embedded within the underwater rock formations. Facilities at the site include parking, toilets, and a cafe.

North Beach in Kingston offers a freshwater snorkeling experience featuring a mix of reef and seagrass habitats. The site is characterised by a steep drop-off located close to the shore, which transitions into sandy patches. Conditions are generally suitable for beginners, though the area is subject to mild currents, surf, and potential rip currents. Water temperatures fluctuate significantly throughout the year, ranging from 2C in March to 22C in August. Access is via a shore entry. On-site facilities include parking, toilets, showers, changing rooms, a rinse station, and a cafe to support visitors.

Wellington Rotary Beach provides shore access to Lake Ontario, featuring a stony beach entry. The underwater topography is characterised by large rocks and boulders that create a complex environment for local freshwater fish and invertebrates. Divers can expect visibility ranging from 10 to 20 metres, though water temperatures vary significantly between 2C and 23C, with potential for thermoclines. This site is suitable for beginners, with mild currents and typical dive durations of 45 minutes. Facilities available at the beach include parking, toilets, showers, changing rooms, and a rinse station. Snorkelling is also possible at this location.

The Juno is a shallow freshwater shipwreck located 200 metres from shore in Kingston, Canada. Resting at an average depth of 5 metres, this site is suitable for beginners and accessible by both boat and shore entry. Divers and snorkellers experience mild currents and visibility ranging from 5 to 10 metres. Water temperatures fluctuate significantly throughout the year, ranging from 3 to 22 degrees Celsius, requiring appropriate thermal protection. The site features the remains of the wreck structure, which provides a habitat for various temperate freshwater fish and invertebrates. Due to the location, visitors should remain aware of boat traffic and potential entanglement hazards.

Dunes Beach at Sandbanks Provincial Park offers a unique freshwater snorkeling experience defined by its massive underwater sand dunes. Located on the sheltered West Lake side of the park, the site features depths ranging from 2 to 8 metres, with an average of 5 metres. Water temperatures here are warmer than those found on the Lake Ontario side of the park. Conditions vary, with visibility typically between 5 and 15 metres and mild currents. Access is via a shore entry. The site is suitable for beginners, though snorkelers should remain aware of potential rip currents and surf conditions. Facilities include parking, toilets, showers, changing rooms, a cafe, guided tours, and equipment rental.

Lucas Point Park in Kingston offers a unique freshwater snorkelling experience over flat, pitted limestone rock formations. These shelf-like structures, which resemble the topography found in Tobermory, contain visible fossils within the rock. The site is accessed via the shore and is best suited for intermediate snorkellers due to the mild currents. Water temperatures fluctuate significantly throughout the year, ranging from 3C in the winter months to 22C in August. Facilities at the park include parking and toilets for visitor convenience. The site is rated 4/5 for snorkelling, providing an interesting underwater landscape to explore.