Joel Stone Beach in Gananoque provides a convenient shore entry for snorkelling in the Thousand Islands. The site features a sandy entry point leading to rocky bottom formations and a deep-water swim dock. Water temperatures fluctuate significantly throughout the year, ranging from 2°C in winter to 23°C in August. The swimming season typically occurs between July and September when temperatures remain above 20°C. Due to the presence of deep water and active boat traffic, snorkellers should exercise caution while exploring the area. Facilities available at the beach include parking, toilets, and showers.

The Prince Regent is a freshwater wreck dive located in Kingston Harbour. Situated 50 metres from the shore, this site is accessible via a shore entry and is suitable for beginner divers. The wreck lies at a shallow depth ranging from 2 to 4 metres, with an average depth of 3 metres. Divers should be prepared for mild currents and visibility that fluctuates between 3 and 10 metres. Water temperatures vary significantly throughout the year, ranging from 2°C in February to 23°C in August. Due to the nature of the site, primary hazards include cold water and potential entanglement. Parking is available for visitors.

The Wolfe Islander II is a shipwreck and artificial reef located 500 metres offshore in Kingston Harbour. Resting at depths between 7 and 27 metres, with an average depth of 18 metres, this site requires boat access. Divers can explore the vessel, which features an accessible pilothouse and engine room. Conditions include mild currents and visibility ranging from 5 to 18 metres. Water temperatures are cold, typically remaining between 4 and 6 degrees Celsius at depth throughout the season. This site is suited for intermediate divers due to potential hazards including entanglement risks, low visibility, and cold water temperatures.

Stacked Hulls in Kingston Harbour consists of multiple layered wreck structures resting in 3 to 7 metres of water. This site is suited for intermediate divers due to strong, variable currents and significant boat traffic on the surface. Visibility is highly changeable, ranging from 5 to 30 metres. Divers must manage entanglement risks around the wreckage and use a surface marker buoy. Water temperatures fluctuate between 2 and 23 degrees Celsius, necessitating appropriate thermal protection. The site supports a variety of temperate freshwater fish and invertebrates typical of the region. Access is by boat only, located 15 metres from shore.

Landon Bay in the Thousand Islands offers a freshwater dive experience featuring a large, flat granite rock that extends into the water, serving as a natural platform for shore entries. The bay is characterised by its shallow, broad topography, which functions as a nursery for local aquatic life. Divers can expect to encounter typical temperate freshwater fish and invertebrates within this habitat. Conditions at this site are variable, with water temperatures ranging from 2C to 23C throughout the year. Due to the presence of boat traffic and strong currents, divers should exercise caution. The site is suitable for beginners and provides facilities including parking and toilets.

The Munson Wreck is a deep freshwater site located 1540 metres offshore in Kingston Harbour. Resting at depths between 34 and 37 metres, this artificial reef is suited for advanced divers. Visibility is highly variable, ranging from 9 to 30 metres, and the site is subject to significant temperature drops below the thermocline. Surface temperatures can reach 23C, but bottom temperatures remain cold, often between 4C and 9C. Due to these conditions, drysuits are strongly recommended for all dives. Boat access is required to reach the site, and guided tours are available to assist with navigation around the wreck structure.

Horace Taber is a shallow freshwater dive site located within Kingston Harbour, Canada. With depths recorded at approximately 1 to 2 metres, the site is suitable for shallow water activities. Water temperatures fluctuate significantly throughout the year, ranging from a low of 2C in February and March to a high of 23C in August. Due to the very shallow nature of the site, it is primarily accessed from the shore. Divers should be prepared for variable conditions typical of a harbour environment. No specific marine life has been documented at this location.

Aloha-Effie Mai is a freshwater dive site located in Kingston Harbour, offering a shallow reef experience. The site features depths ranging from 2 to 5 metres, though it drops to 28 metres in deeper sections. Divers experience mild currents and visibility between 10 and 30 metres. Due to the significant seasonal temperature variation, ranging from 2 to 23 degrees Celsius, appropriate thermal protection is required. Access is by boat. Divers should avoid entering cave or swim-through areas unless they possess specific cave training and must maintain buoyancy control to avoid contact with sharp rocks. This site is suitable for beginners.