Keppel Pier at the Field Studies Council in Millport offers accessible snorkelling in the Oban and Sound of Mull region. The site is suitable for beginners and provides both shore and boat entry options. Underwater, the pier pilings are encrusted with marine life, supporting a diverse range of species. Snorkellers may encounter sea stars, including common and red comb varieties, alongside various crab species like the European green crab. Other recorded sightings include gray seals, catsharks, and several types of jellyfish. Water temperatures fluctuate between 8C and 16C throughout the year, with the site maintaining a snorkel rating of 4/5.

Wishing Well is a shore-entry site located on the east side of the island, featuring a cleared pathway through the rocks that leads directly into a kelp forest and boulder reef. The site is suitable for beginners, with depths ranging from 8 to 30 metres and an average depth of 15 metres. Divers can expect moderate currents and visibility between 5 and 10 metres. Species recorded around this area include various sea stars, crabs, catsharks, and seals. Facilities at the site include parking and air fills. Typical dives last approximately 45 minutes, and the site is also suitable for snorkelling.

The SS Kintyre is a wreck dive located 310 metres from shore in the Sound of Mull. Divers typically access the site via boat or shore, navigating a pipe that descends from 8 metres to 30 metres. The wreck itself lies at depths reaching 32 metres, with the site profile extending down to 50 metres. Due to moderate currents and potential down currents, this site is suitable for advanced divers only. Visibility is limited to 3 to 5 metres, and water temperatures range from 8C to 16C throughout the year. Divers should be prepared for cold water, decompression requirements, and overhead environments while exploring the wreckage.

The Akka Wreck is a shipwreck site situated on a reef in the Sound of Mull. The structure lies at depths between 30 and 40 metres, making it suitable for advanced divers. Divers can expect mild currents and visibility typically ranging from 5 to 10 metres. Water temperatures are cold, fluctuating between 8C and 16C throughout the year, necessitating the use of a drysuit or a thick wetsuit with hood and gloves. The site is accessible from the shore. As facilities are not confirmed on site, divers should arrive fully prepared with all necessary equipment.

Clauchlands Farm is a sheltered site located on the northeast side of Lamlash Bay. The topography consists of rocky reefs, kelp forests, and seagrass beds, situated within the South Arran Marine Protected Area. This shore entry site is suitable for beginners and offers a snorkel rating of 4/5. Divers and snorkellers can expect to encounter a variety of temperate marine life typical of the region's reef and kelp habitats. Water temperatures range from 8C in winter to 16C in August. Be aware of boat traffic in the area. Parking is available, and guided tours can be arranged for those visiting this coastal location.

Ballast Bank in Troon is a rocky shoreline featuring extensive kelp forests and gullies. This site is suitable for beginners, with depths reaching up to 7 metres. Access is via the shore, and the area is well-supported by local facilities including parking, toilets, and a cafe. Divers and snorkellers can explore the dense seaweed beds, which provide a habitat for a variety of temperate marine life and invertebrates. Conditions vary, and visitors should be aware of potential hazards including boat traffic, entanglement, jellyfish, and surf. The water temperature ranges from 8C to 16C throughout the year.

Black Rock is located within Scotland's first community-led No Take Zone in the Sound of Mull. This protected area features significant seagrass meadows and maerl beds, which provide a stable habitat for local marine life. The site is accessible via a shore entry and is suitable for beginners, holding a high rating for snorkelling. Water temperatures in this region vary throughout the year, ranging from 8C in the late winter months to 15C during the summer. As a protected zone, the site offers a unique opportunity to observe a habitat free from fishing activity.

Imachar is a rugged rocky outcrop located on the west coast of Arran. The site features underwater geology characterised by deep gullies and crevices, providing a varied environment for snorkellers to explore. Water temperatures at this marine site fluctuate between 8C and 16C throughout the year. The site is accessed via the shore and is rated as suitable for intermediate snorkellers. While the habitat supports a range of temperate marine life, including various reef fish and invertebrates, specific sightings are not confirmed. The rocky terrain and complex underwater structures make this a notable location for those comfortable with shore-based exploration in the Oban and Sound of Mull region.