Tresaith Waterfall Rocks is a distinctive site where a freshwater waterfall cascades directly into the sea. Snorkellers can explore the reef environment around the rocks at the base of the waterfall, which features a mix of marine and freshwater-influenced conditions. Access is via the shore, and the site is suitable for beginners. Conditions include mild currents and water temperatures ranging from 9C to 17C. Due to the cool water, appropriate thermal protection is required to prevent heat loss. Facilities available at the site include parking, toilets, showers, a cafe, and first aid services.

Carreg Bica, known as the Giant's Tooth, is a distinctive rock formation located between Llangrannog and Cilborth beach. This shore-entry site features shallow kelp forests and rocky reef topography. It is suitable for beginners, though conditions vary with potential hazards including surf, rip currents, jellyfish, and sea urchins. Water temperatures range from 9C in winter to 17C in summer, making a wetsuit recommended for comfort. Visibility can be low. Facilities at the site include parking, toilets, and showers. Snorkellers should be prepared for cool water and changing coastal conditions.

Ynys Lochtyn is a tidal island and headland in Pembrokeshire, United Kingdom, featuring a rugged reef and kelp forest environment. This site is suited for advanced snorkellers due to the presence of strong currents and surf conditions. Access is via the shore, where the topography includes sheltered gullies. Water temperatures fluctuate between 9C and 17C throughout the year. Due to the challenging nature of the currents and potential for entanglement in the kelp, this location requires careful planning and experience. It is a dynamic marine environment shaped by tidal movements.

Cwmtydu Cove is a narrow, deep bay in Pembrokeshire, United Kingdom, historically known as a smuggler's cove. The site offers shelter for snorkellers, particularly along the rocky edges that define the bay. Entry is via the shore. Water temperatures fluctuate throughout the year, ranging from 9C in the late winter to 17C during the summer months. Due to the nature of the terrain and the coastal environment, this site is best suited for intermediate snorkellers. There is no specific data regarding marine life at this location.

Dolau Beach is a sheltered coastal site located on the west side of the harbour wall in New Quay. This shore-entry location is suitable for beginners and offers a snorkel rating of 3 out of 5. Water temperatures fluctuate throughout the year, ranging from 8C in the winter months to 18C in August. Facilities available at the site include public toilets and parking. While marine life is not confirmed at this specific location, species recorded around this area include various crabs, snails, shannies, and jellyfish, as well as the occasional gray seal.

Cei Bach in Pembrokeshire offers a quiet shore snorkelling experience characterised by shallow reefs and extensive rock pools. Located at the eastern end of the beach, the rocky point provides a sheltered environment suitable for beginners. Conditions are generally mild, though water temperatures fluctuate between 8C in the winter and 18C during August. Access is straightforward from the shore, with parking and toilet facilities available nearby. As a shallow reef site, it is best suited for relaxed snorkelling sessions rather than deep-water exploration. Divers and snorkellers should be prepared for variable conditions typical of the Welsh coastline.

Porthgain Harbour Gullies, located within the Skomer Marine Reserve, offers a shallow reef environment suitable for beginners. Divers and snorkellers access the site via the harbour slipway, leading to a series of rocky gullies situated just outside the harbour mouth. The site features depths ranging from 3 to 8 metres, with an average depth of 5 metres. Conditions include moderate currents and potential boat traffic, requiring awareness during the typical 40-minute dive. Water temperatures fluctuate between 9C and 16C throughout the year. Facilities available at the harbour include parking, toilets, and a cafe.

Abereiddy Blue Lagoon is a flooded former slate quarry featuring vertical slate walls that drop to depths of 25 metres. The site offers a unique underwater landscape with walls covered in tube worms. Snorkellers can explore this environment from a shore entry, with the site located 300 metres from the shore. Conditions are variable, with visibility ranging between 3 and 10 metres and water temperatures fluctuating from 9C to 16C throughout the year. Due to moderate currents and potential hazards including cold water, rip currents, and overhead environments, this site is suited for intermediate skill levels. Typical sessions last around 40 minutes.