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.

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.

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.

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.

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.

Derrynane Bay on the Kerry Coast offers a mix of reef and kelp forest habitats suitable for both diving and snorkelling. The site features depths ranging from 1 to 18 metres, with an average depth of 6 metres. Shore access is available, though divers and snorkellers should be aware of potential hazards including surf, rip currents, and strong currents. Visibility typically ranges between 5 and 10 metres. Water temperatures are cold, fluctuating between 10C and 15C throughout the year, necessitating appropriate thermal protection. The site is well-supported by local facilities, including parking, toilets, a cafe, and equipment rental services.

Cuas Crom on Valentia Island is a deep-water cove featuring a small pier and slipway for shore access. The site is characterised by steep cliff faces that extend underwater, creating a vertical wall and drop-off topography. Snorkellers can explore this rugged reef structure, which reaches depths starting at 4 metres. Conditions at this location are generally mild, though water temperatures fluctuate between 10C and 16C throughout the year. Due to the nature of the terrain and the depth profile, this site is best suited for intermediate snorkellers.

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.