Cross Island in St. Margarets Bay offers a combined wreck and reef dive in cold Atlantic waters. Divers can explore depths ranging from 7 to 13 metres, with visibility typically between 5 and 10 metres. The site is accessible only by boat and is suited for intermediate divers. Due to water temperatures ranging from 2 to 15 degrees Celsius, a drysuit or thick 14mm wetsuit is mandatory. The environment supports temperate Atlantic marine life, including various invertebrates and fish species typical of the region. Divers must be prepared for hazards including surge, rip currents, and potential overhead environments within the wreck structure.

The Bluff is a shallow reef site in St. Margarets Bay, Canada, featuring a consistent depth of 4 metres. This site is suitable for beginner divers, though the cold water temperatures, ranging from 2C to 17C, require a drysuit or thick wetsuit. Visibility is variable, spanning 10 to 30 metres. Access is by boat, which helps avoid shore surf. Divers should remain vigilant for boat traffic in the area and exercise caution regarding sea urchins and sharp rocks on the seabed. Typical dive times are approximately 30 minutes, with mild currents that assist with buoyancy control.

Seal Rock is a shallow reef located in St. Margarets Bay, Canada, offering a consistent depth of 8 metres. This site is suitable for beginner divers and snorkellers, featuring mild currents and visibility ranging from 10 to 30 metres. The rocky reef structure supports temperate marine life and invertebrates typical of the region. Due to water temperatures fluctuating between 2 and 16 degrees Celsius, a drysuit or thick wetsuit with hood and gloves is required. Access to the site is by boat only. Divers should maintain buoyancy control to avoid contact with the sharp reef surfaces.

Ovens Point in St. Margarets Bay offers a diverse shore dive featuring a shallow reef, a kelp forest, and a cave system. The site is suitable for beginners, with depths ranging from 7 to 13 metres and an average depth of 10 metres. Divers experience mild currents and visibility between 5 and 10 metres. Due to the overhead environment within the cave, a torch is recommended. Water temperatures fluctuate significantly throughout the year, ranging from 2 to 15 degrees Celsius, necessitating appropriate thermal protection. Divers should remain aware of surge and local boat traffic when entering from the shore.

The Muff is a combined natural and artificial reef located 12 kilometres offshore in St. Margarets Bay. The site maintains a consistent depth of 8 metres, offering intermediate divers extended bottom time. Visibility is reliable at 30 metres, though divers must contend with cold water temperatures ranging from 2 to 16 degrees Celsius. A boat is required to reach the site, where mild currents are typical. Hazards include surge and the presence of sea urchins, requiring careful buoyancy and hand placement. The habitat supports a variety of temperate marine life, including various fish, crustaceans, and invertebrates typical of the region.

Anemones Alley is a shallow reef site located in St. Margarets Bay, Canada. The site maintains a consistent depth of 3 metres, offering visibility up to 30 metres. Divers should be prepared for moderate currents, which provide an opportunity to practise buoyancy control. Water temperatures fluctuate significantly throughout the year, ranging from 2 to 17 degrees Celsius, necessitating the use of a drysuit or thick wetsuit. Access to the site is by boat. Divers should wear protective exposure suits to mitigate potential stings from jellyfish and exercise caution when boarding or exiting the vessel to avoid contact with sharp structures near the site.

Cunard's Beach in St. Margarets Bay features a combination of reef and cave topography. The site is geologically notable for its quartz-veined cliffs and sea caves. Divers and snorkellers can expect depths ranging from 2 to 13 metres, with an average depth of 8 metres. Conditions are variable, with visibility between 3 and 12 metres and moderate currents. The site is accessible via both shore and boat entries. Due to the potential for cold water, surf, and strong currents, this site is best suited for intermediate divers. Facilities available at the location include parking, toilets, showers, a rinse station, a cafe, and a dive shop offering guided tours.

Big Duck Island in St. Margarets Bay features a combination of reef structures and kelp forests. Divers can explore depths between 15 and 30 metres, where the kelp creates a textured environment. Visibility typically ranges from 5 to 15 metres. The site is subject to mild currents, though surge and swell can vary, requiring careful planning. Due to cold water temperatures between 2 and 11 degrees Celsius, a drysuit is recommended. Boat access is required, and divers should remain vigilant for boat traffic when surfacing near the pinnacle. The habitat supports a variety of temperate marine life and invertebrates typical of the region.