Oilean na hÉisc, located off Valentia Island, Ireland, is a marine dive site with a recorded depth of approximately 13 metres. The site is characterised by its temperate Atlantic environment, with water temperatures fluctuating between 10C in the winter and 16C during the late summer months. The habitat supports a variety of temperate marine life, including various reef fish, cephalopods, and invertebrates typical of the region. Due to the depth and environmental conditions, this site is suitable for divers with appropriate temperate water experience. Access to this location is typically by boat.

Basalt Cliffs on Valentia Island offers a marine dive experience with depths ranging from 13 to 14 metres. The site is characterised by its geological formation, providing a distinct underwater topography. Water temperatures at this location fluctuate between 10C and 16C throughout the year. Species recorded around this area include catsharks, brittle stars, sea stars, crabs, snails, sea squirts, and sea cucumbers. Given the depth and environmental conditions, this site is generally suited for divers with appropriate experience for temperate Atlantic waters. Access to the site is typically via boat, though conditions can vary significantly depending on local weather patterns.

Knightstown Pier on Valentia Island offers a sheltered environment for snorkellers, with entry easily managed via the slipway or steps. The site is noted for its stone pier structure, which provides crevices that support various marine organisms. Water temperatures at this location range from 10C to 16C throughout the year. While specific sightings at the pier are not confirmed, species recorded around this area include catsharks, compass jellyfish, orange-clubbed nudibranchs, crabs, sea stars, brittle stars, snails, sea squirts, fanworms, and sea cucumbers. The site is suitable for beginners and provides a calm, accessible experience for those exploring the Kerry Coast.

The Perch, also known as Harbour Rock, is a shallow marine dive site located off Valentia Island, Ireland. The site features a depth range of approximately 6 to 7 metres. Given the shallow nature of the topography, it is suitable for divers seeking a relaxed, shallow-water experience. Water temperatures at this location fluctuate throughout the year, ranging from 10C in the winter months to 16C during the peak of summer. Divers should be prepared for variable conditions typical of the Irish coast. Access to the site is generally facilitated by boat, and it is well-suited for those looking for shorter, shallower dives.

Kells Bay Pier offers a sheltered environment for divers and snorkellers along the Kerry Coast. The site features a combination of natural and artificial reef structures, with depths ranging from 4 metres. Access is via a shore entry from the pier or the adjacent beach. Conditions are generally suitable for beginners, though divers should be aware of potential surf and the presence of jellyfish. Water temperatures fluctuate between 10C and 16C throughout the year. The area is protected from most wind directions, providing a relatively calm setting for underwater exploration. Parking is available at the site, and night diving is permitted.

Ballinskelligs Pier serves as the primary entry point for exploring the southern end of Ballinskelligs Bay on Valentia Island. This shore dive features a topography of rocky reefs and dense kelp forests. Divers and snorkellers can navigate depths ranging from 2 to 18 metres. Conditions are variable, with visibility typically between 5 and 10 metres and mild currents. The site is suitable for intermediate divers, while snorkellers will find the area near the castle ruins accessible. Facilities at the site include parking, toilets, showers, a rinse station, and a cafe. Be aware of potential hazards including jellyfish, rip currents, and surf.

Minard Castle, located at Kells Bay, is a distinctive storm beach characterised by large rounded boulders and Atlantic waters. The site is situated directly beneath the ruins of a 16th-century castle. Snorkellers can explore the rocky gullies found to the right of the slipway. This shore-entry site is suitable for beginners and offers a snorkel rating of 4 out of 5. Water temperatures at this location vary throughout the year, ranging from 10C in the winter months to 16C during the peak of summer in August and September.

O'Carroll's Cove in Glanbeg features a sheltered reef environment characterised by rocky outcrops flanking a white sand beach. This site is suitable for beginners, offering shallow depths typically between 5 and 10 metres, with an average depth of 5 metres. Divers and snorkellers can expect mild currents and visibility ranging from 5 to 10 metres. Water temperatures fluctuate seasonally, reaching a high of 16C in late summer and dropping to 10C in winter months. Access is via the shore, and the location includes a cafe for visitor use.