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.

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.

Bachman's Beach in St. Margarets Bay offers a mix of muck and reef topography, featuring sand, rock, and silt substrates. This shore-entry site is suitable for beginners, with depths ranging from 1 to 14 metres and an average depth of 4 metres. Divers and snorkellers can expect mild currents and visibility between 6 and 12 metres. The habitat supports a variety of temperate marine life, including various fish and invertebrates typical of the region. Water temperatures are generally cold, ranging from 2C to 15C, though they can be warmer in July and August. Hazards include boat traffic, cold water, jellyfish, and potential for low visibility. Parking is available on-site.

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.

Second Peninsula is a shore-entry reef dive located in St. Margarets Bay, Canada. The site features depths between 10 and 20 metres with visibility typically ranging from 5 to 10 metres. Divers encounter mild currents, making it suitable for beginners, though the cold water temperatures between 2 and 14 degrees Celsius necessitate the use of a dry suit. The habitat supports a variety of temperate reef fish and invertebrates adapted to these nutrient-rich conditions. Entry requires caution due to potential surf, shore breaks, and the presence of sea urchins. On-site facilities include parking and toilets to assist with dive logistics.

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.

The HMCS Saguenay is an artificial reef located in St. Margarets Bay, Canada. This wreck site sits at an average depth of 25 metres, with a depth range between 21 and 30 metres. Access is by boat only, situated 18.5 kilometres from the shore. Divers should be prepared for cold water temperatures ranging from 2 to 11 degrees Celsius and moderate currents. Visibility varies significantly from 10 to 30 metres. Due to the depth and potential for entanglement, this site is suitable for advanced divers. The surrounding habitat supports a variety of temperate marine life, including various fish and invertebrates typical of the region.

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.