Dumhnach Beach on Inishbofin Island offers a shore-entry snorkelling experience across reef and seagrass habitats. The site is suitable for beginners, with depths ranging from 1 to 5 metres and an average depth of 3 metres. Visibility typically spans 10 to 20 metres. Due to the nature of the location, divers and snorkellers should be aware of strong currents, rip currents, and surf conditions. Water temperatures remain cold throughout the year, fluctuating between 9C and 16C, so short durations are recommended unless you are experienced in cold water. Facilities at the site include showers and a local dive shop.

Spotted Rock is a marine reef and wall site located in Ireland, accessible only by boat. The site features depths ranging from 10 to 40 metres, with an average depth of 25 metres. Divers should be prepared for mild currents, though strong currents can occur. Visibility typically ranges between 10 and 20 metres. Water temperatures fluctuate between 9C and 15C throughout the year. This site is suited for intermediate divers, with typical dive times around 45 minutes. Night diving is permitted at this location. Boat charter services and air fills are available for those planning a visit.

Mweemore is a reef dive site located in Ireland. The site features an average depth of 17 metres. Access to the reef requires a boat, though entry can be managed via both boat and shore depending on specific conditions. Divers should be prepared for moderate currents and cold water temperatures, which range from 9C in February to 16C in August and September. Due to the environmental conditions and current, this site is best suited for intermediate divers. There is no specific marine life data available for this location.

Carraig Cois Ceim is a reef dive located off the southwest coast of Mayo, Ireland. This site is suited for intermediate divers, with depths ranging from 18 to 30 metres. Access is strictly by boat due to a strong surf break at the shore. Divers can expect visibility between 10 and 30 metres, with the clearest conditions typically occurring during settled summer weather. Water temperatures fluctuate between 9 and 16 degrees Celsius throughout the year, necessitating appropriate thermal protection. Be aware of potential currents in the area and monitor local conditions closely before descending to the reef.

Glassilaun Beach, situated near the mouth of Killary Fjord, offers shore access to rocky outcrops and kelp forests. The site is suitable for beginners, with depths ranging from 1 to 18 metres and an average depth of 5 metres. Visibility varies between 3 and 15 metres, and currents are generally mild. Water temperatures are cold, ranging from 9C to 16C throughout the year. Species recorded around this area include common lobster, compass jellyfish, flatworms, catsharks, squat lobsters, cod, common sea stars, grey sea slugs, zoanthids, brittle stars, tube worms, crabs, and common moon jellyfish. Hazards include cold water and jellyfish. Facilities include parking, toilets, showers, rinse stations, guided tours, and equipment rental.

Inish Barna is a boat-access site located at the mouth of Killary Harbour, Ireland. The topography consists of dramatic underwater walls, canyons, and reefs. Divers can expect depths ranging from 6 to 45 metres, with an average depth of 25 metres. Conditions vary, with visibility spanning 3 to 50 metres and moderate currents. The site is suitable for intermediate divers, and boat access is required. Hazards include potential entanglement, strong currents, and surf. Facilities available at the site include showers and changing rooms. Typical dive times are approximately 50 minutes, and the site is also suitable for snorkelling.

Doonee Beacon is a marine reef site in Ireland suitable for beginner divers. The site features a consistent depth of approximately 10 metres. Access is exclusively by boat. Divers should be prepared for variable conditions, as the site is subject to moderate currents, surf, and potential low visibility. Hazards at this location include cold water temperatures, which range from 9C to 16C throughout the year, as well as risks of entanglement and the presence of sea urchins. Given the environmental factors, divers should maintain appropriate awareness of their surroundings and thermal protection requirements.

The Barge is a wreck dive site located in Ireland. The site is shallow, with an average depth of 6 metres. Divers should be aware that conditions at this location can vary, and strong currents are a known hazard. Due to the presence of these currents, the site is best suited for intermediate divers. Water temperatures at the site fluctuate throughout the year, ranging from 9C in the winter months to 16C during the late summer and early autumn. As a wreck site, it offers a specific underwater topography for those interested in maritime history.