Calgary Bay on the Isle of Mull is a shore-entry site known for its white shell sand and rocky edges that transition into kelp forests. Suitable for beginners, the site offers a snorkel experience with water temperatures ranging from 8C to 15C throughout the year. The habitat supports a variety of temperate marine life, including various reef fish and invertebrates typical of the region. Snorkellers can explore the shallow areas where the rocky topography provides shelter for local species. Conditions vary, so visitors should assess the water state before entry.

The Hispania is a shipwreck located in the Sound of Mull, resting at a depth of approximately 15 metres. This site offers a dive experience focused on the remains of the vessel. Conditions in the Sound of Mull vary, and divers should be prepared for water temperatures ranging from 8C to 14C throughout the year. Due to the nature of wreck diving and the specific depth, this site is generally suited for divers with appropriate training and experience in wreck environments. Access to the site is typically by boat.

Calve Island Cove is a diverse dive site within the Sound of Mull, featuring a combination of reef, wall, and kelp forest topography. This site requires boat access and is suited for intermediate divers due to moderate currents and depths ranging from 10 to 44 metres, with an average depth of 20 metres. Visibility is typically around 15 metres. The underwater environment supports a variety of temperate marine life and invertebrates typical of the region. Divers should be prepared for deep water, potential low visibility, and strong currents. Air fills and guided tours are available for those visiting this location.

The Meldon is a shipwreck located in the Sound of Mull, resting at depths between 4 and 20 metres with an average depth of 12 metres. This site is suitable for beginner divers, offering a manageable structure with no significant currents. Visibility ranges from 10 to 30 metres, allowing for clear observation of the wreck as it functions as an artificial reef. Access to the site is by boat only, located 400 metres from the shore. Given the water temperatures, which fluctuate between 8 and 14 degrees Celsius, a drysuit or a thick, well-fitted wetsuit is recommended for all dives.

The SS Rondo is a challenging wreck dive located in the Sound of Mull, United Kingdom. The vessel lies at depths ranging from 4 to 50 metres, with an average depth of 30 metres. Due to the significant depth and strong currents, this site is strictly for advanced divers. Boat access is required, and dives must be timed precisely with slack water windows. Visibility varies between 10 and 30 metres. Given the water temperatures of 8 to 14 degrees Celsius, a drysuit is essential. Divers should be prepared for decompression requirements and potential entanglement risks within the wreck structure. Always carry a delayed surface marker buoy for ascent.

The Shuna Wreck is a notable wreck site located in the Sound of Mull, resting at depths between 16 and 32 metres with an average depth of 18 metres. This site is suitable for intermediate divers with wreck certification. Access is strictly by boat, and divers should be prepared for surge and swell conditions during entry. Visibility typically ranges from 10 to 30 metres, though divers must remain cautious of sharp edges and entanglement risks throughout the structure. Due to local boat traffic, the use of a surface marker buoy is essential. The site experiences mild currents, though water movement can change during the dive.

Lochaline Pier provides access to a diverse underwater environment featuring vertical walls, reefs, kelp forests, and wrecks within the Sound of Mull. The site is characterised by a dramatic drop-off, with depths ranging from 1 to 90 metres. Due to strong currents, boat traffic, and cold water temperatures between 8C and 14C, this site is suited for advanced divers. Snorkellers can explore the shallower sections near the old pier. Divers should be aware of hazards including low visibility, entanglement risks, and down currents. Facilities at the site include parking, air fills, a dive shop, boat charters, guided tours, a cafe, and gear storage.

Lochaline provides diverse underwater topography including wrecks, walls, and reefs accessible via a single shore entry. The site spans a significant depth range from 1 to 90 metres, with an average depth of 20 metres. Visibility typically fluctuates between 3 and 15 metres. Divers should be prepared for moderate currents, which can strengthen, alongside potential down currents and boat traffic. Due to water temperatures ranging from 8 to 14 degrees Celsius, a drysuit is recommended. An on-site dive shop provides air fills and guided tours, which are advised for managing the site's specific current patterns and depth profiles.