McKay's Harbour is a secluded reef site located at the base of the Lion's Head cliffs in Georgian Bay. The topography consists of a boulder-strewn bottom and underwater ledges, providing a varied environment for snorkellers. Depths range from 1 to 10 metres, with an average depth of 5 metres. Access is possible via both boat and a rugged hike. Conditions vary, with visibility typically between 5 and 20 metres and moderate currents. The water is cold, ranging from 2C to 20C throughout the year, and surf can be a hazard. This site is best suited for intermediate-level snorkellers.

Sydney Bay, located within Cape Croker Park, features a rugged shoreline and dramatic limestone ledges. This freshwater site offers a combination of reef and drop-off topography, with depths ranging from 5 to 18 metres and an average depth of 12 metres. Divers and snorkellers can expect visibility between 5 and 15 metres. Access is via the shore, and the site is suitable for intermediate skill levels. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 21 degrees Celsius, with thermoclines possible during summer months. Hazards include cold water and surf. Facilities at the site include parking, toilets, showers, and changing rooms.

Spirit Rock in the Georgian Bay Outer Sites is a freshwater reef and drop-off site characterised by massive limestone boulders and deep crevices. Access is via a historic iron spiral staircase descending the Niagara Escarpment to the water's edge. The site is suitable for intermediate snorkelers, with visibility ranging from 6 to 17 metres. Conditions vary, with water temperatures fluctuating between 2C and 20C throughout the year. Divers and snorkelers should be aware of potential hazards including cold water, deep sections, down currents, entanglement, surge, and thermoclines. Parking is available near the site.

The Water Treatment Plant in Georgian Bay Outer Sites is an artificial reef site featuring intake pipes that provide structure in shallow water. Divers and snorkellers can explore this area at depths ranging from 3 to 5 metres, with an average depth of 4 metres. The site is accessible from the shore and is suitable for beginners. Conditions vary, with visibility typically between 5 and 15 metres and mild currents. Water temperatures fluctuate significantly throughout the year, ranging from 2°C to 20°C, with a thermocline present. Divers should be aware of boat traffic and cold water hazards. Facilities at the site include parking and toilets.

Cedar Hill in the Georgian Bay Outer Sites offers a combination of natural reef and artificial structure accessible directly from the shore. The site features depths ranging from 11 to 18 metres, with an average depth of 15 metres. Divers should be prepared for moderate currents and a distinct thermocline. Visibility varies significantly, ranging from 5 to 17 metres depending on conditions. Water temperatures fluctuate between 1 and 21 degrees Celsius, necessitating appropriate thermal protection. Due to active boat traffic at the surface, the use of a surface marker buoy is strongly advised for all ascents.

Cedar Hills in the Georgian Bay Outer Sites offers a combination of wall and artificial reef topography. This freshwater site is accessible via a shore entry and is suitable for beginners. Divers typically experience depths ranging from 11 to 18 metres, with an average depth of 15 metres. Conditions are generally stable with mild currents and visibility between 15 and 30 metres. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 21 degrees Celsius, and a thermocline is present. Facilities at the site include parking and toilets. A typical dive duration is approximately 45 minutes. Due to the nature of the environment, cold water is a primary hazard.

Bluewater Park Beach in Georgian Bay offers an accessible freshwater site for both divers and snorkellers. The topography features shallow weed beds and the remnants of old dock pilings, providing an interesting structure for exploration. Entry is via a sandy shore, making it suitable for beginners. Depths are shallow, ranging from 1 to 3 metres with an average of 2 metres. Conditions are generally mild, though water temperatures fluctuate significantly throughout the year, ranging from 2°C to 20°C. Facilities at the site include parking, toilets, showers, and a rinse station. Typical dives last approximately 45 minutes.

Cedar Hill Park in the Georgian Bay Outer Sites offers a shore-entry dive featuring a gradual rocky slope. This site is suitable for beginners and provides a unique underwater scavenger hunt, with structures including a dome, a windmill, and the remains of a small boat. Divers can expect depths ranging from 5 to 18 metres, with an average depth of 15 metres. Visibility typically varies between 10 and 15 metres. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 21 degrees Celsius, with a thermocline present. Facilities at the site include parking and toilets.