Carnoch Bay in Ballaculish offers diverse diving opportunities ranging from open water to technical levels. Dives directly from the bay reach a maximum depth of 12 metres, while further options are accessible from the end of the bay following a 100-metre walk. Conditions feature variable currents, and divers must remain aware of potential boat traffic. Due to these conditions, the use of a delayed surface marker buoy is required. The site is suitable for various skill levels, though good buoyancy control is recommended for the deeper areas, which extend to 50 metres. Divers should be prepared for cold water temperatures typical of the region.

Creagan is a high-energy marine site located on the north shore of Loch Creran near the Creagan Inn. The topography consists of a mix of reef and artificial reef structures, offering diverse seabed types. Divers can expect depths ranging from 3 to 25 metres, with an average depth of 14 metres. Access is via the shore, though the site is subject to strong currents and boat traffic. Due to these conditions, the site is suited for intermediate divers. Visibility at the site typically ranges between 3 and 10 metres. Facilities available at the location include parking, showers, and a cafe.

Queenie Reef in Loch Creran is a distinctive site featuring a reef and wall structure. It is one of only two locations globally where serpulid worms form massive biogenic reefs, creating fragile, colourful structures alongside dense mats of brittle stars. Divers can expect depths ranging from 6 to 25 metres, with an average depth of 12 metres. A freshwater layer at the surface may cause a shimmering effect, and a thermocline is often present. Conditions vary with visibility between 3 and 10 metres and mild currents. This shore-entry site is suited for intermediate divers and offers excellent snorkelling opportunities. Facilities including parking, showers, and air fills are available nearby.

Loch Sunart Wall is a wall and reef site located within the Sound of Mull Wrecks area. The topography features a wall structure suitable for intermediate divers, with depths ranging from 15 to 50 metres and an average depth of 20 metres. Conditions are variable, with strong currents and visibility typically between 5 and 10 metres. Divers may experience a gin and tonic effect in the surface layer. Access is available via both shore and boat entry. Hazards include entanglement, low visibility, strong currents, and surf. Facilities at the site include air fills, guided tours, parking, and boat charter services.

The SS Breda is a Dutch freighter from the Second World War located in the Sound of Mull. The wreck sits upright on the seabed at depths ranging from 12 to 35 metres, with an average depth of 18 metres. Access to the site is by boat only, situated 2400 metres from the shore. Divers may encounter a halocline and thermocline, creating a noticeable difference in water colour and salinity between the surface and deeper sections. The site is suitable for intermediate divers and offers an overhead environment. Snorkellers can explore the upper decks, though the deeper sections are restricted to scuba divers.

Bonawe Quarry is a shore-accessible dive site located in a natural harbour featuring manmade structures. The site is known for the wreck of the Fore Derrick, a small fishing boat resting in approximately 14 to 15 metres of water. Divers can access the site via a slipway, following a mooring line from 5 metres depth to reach the vessel. The wreck offers the opportunity to explore the wheelhouse, though precise buoyancy control is required to prevent silt out. Conditions at this site are variable with mild currents and cold water temperatures. Due to the presence of wreckage and potential for entanglement, this site is suited for intermediate divers.

SAMS Beach is a horseshoe bay located in the Sound of Mull, sheltered by rock formations. This site offers shore access for snorkelers, with depths ranging from 2 to 15 metres and an average depth of 7 metres. The underwater topography consists of reefs and kelp forests. Conditions are generally mild, making this a suitable location for beginners. Facilities available at the site include parking, a cafe, and showers. The site is situated next to the Scottish Association for Marine Science.

Prince's Cairn in Loch Nan Uamh is a historic coastal site featuring rocky reefs and dense kelp forests. This advanced snorkel location requires careful planning due to moderate currents and potential surf conditions. Water temperatures fluctuate between 8C and 14C throughout the year, necessitating a dry suit with a warm undersuit for most months, though a thick semi-dry suit may suffice from late spring to early autumn. Access is via the shore, with parking facilities available nearby. Given the challenging conditions and environmental factors, this site is best suited for experienced snorkellers comfortable with variable marine conditions.