Borth Submerged Forest in Pembrokeshire offers a unique snorkelling experience featuring a 4,500-year-old petrified forest. Visible at low tide, the site consists of peat reefs and gullies that provide an atmospheric underwater environment. Access is via the shore, and the site is best suited for intermediate snorkellers due to varying coastal conditions. Water temperatures fluctuate between 8C and 18C throughout the year. While no species are confirmed at this exact location, species recorded around this area include barrel jellyfish, rock crabs, sea stars, spiny spider crabs, European green crabs, shanny, and rockpool prawns.

Tywyn is a shore-entry reef dive located in Mid Wales. The site features a reef structure suitable for beginners, with depths ranging from 7 to 14 metres. Divers can expect visibility between 5 and 10 metres and mild currents. Water temperatures fluctuate between 8 and 18 degrees Celsius, necessitating a well-fitted wetsuit or drysuit. Entry requires caution due to a potential shore break, so timing your approach between sets is recommended. Once underwater, be mindful of entanglement hazards and maintain close proximity to your group. Parking and toilets are available on-site, providing convenient access for a day trip.

Sun Beach in Pembrokeshire offers a shallow reef environment suitable for beginners. Divers and snorkellers access the site via a slipway, leading to a rocky seabed. Depths range from 1 to 10 metres, with an average of 5 metres. Conditions are variable, with visibility typically between 3 and 10 metres and mild currents. Water temperatures fluctuate between 8C and 18C throughout the year, necessitating appropriate thermal protection such as full wetsuits, hoods, and gloves. The site is well-supported by local facilities, including parking, toilets, showers, and equipment rental. Divers should remain aware of jellyfish in the water.

Sun Beach in Pembrokeshire is a shore-entry reef dive suitable for beginner divers. The reef topography extends between 10 and 20 metres, with an average depth of 10 metres. Divers can expect mild currents and visibility ranging from 10 to 30 metres. Water temperatures fluctuate between 8C and 18C throughout the year, necessitating a drysuit or a 7mm wetsuit for comfort. As on-site amenities are unconfirmed, visitors should plan to bring their own water and changing arrangements. Remain alert for boat traffic in the vicinity at all times.

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.

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.

Blue Lake in Pembrokeshire is a shore-entry quarry dive offering a controlled environment for recreational diving. The site features an artificial reef structure placed on the quarry floor, providing a focal point for exploration. Divers can expect depths ranging from 6 to 12 metres with visibility typically around 5 metres. The water remains cold throughout the year, necessitating appropriate thermal protection such as a drysuit or thick wetsuit. As the site contains overhead environments, divers should maintain awareness of their surroundings and stay within their certification limits. There is no current at this location, making it a practical site for those developing their skills.

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.