St Brides Bay, located within the Skomer Marine Reserve, is a sheltered reef site characterised by red sandstone geology. The seabed features rocky reefs and kelp forests, providing a varied environment for both divers and snorkellers. Depths range from 10 to 30 metres, with an average depth of 12 metres. Conditions are generally mild, with visibility typically between 5 and 15 metres. Access is available via both shore and boat entries, making this a suitable location for beginners. Water temperatures fluctuate throughout the year, ranging from 9C in late winter to 17C in September.

Highpoint is a marine dive site located within the Skomer Marine Reserve in the United Kingdom. The site features a consistent depth of 9 metres. Water temperatures at this location vary throughout the year, ranging from a minimum of 9C in February and March to a maximum of 17C during August and September. As a marine environment, the site is subject to variable conditions typical of the region. It is suitable for divers looking for a shallow, consistent depth profile within the reserve. Access to this site is typically managed via boat from nearby coastal points.

Hen Chicks is a reef dive located within the Skomer Marine Reserve, offering depths between 8 and 16 metres. The site is characterised by mild currents, making it suitable for beginner divers. Visibility is generally good, ranging from 10 to 30 metres. Divers access the site by boat. Water temperatures fluctuate between 9 and 17 degrees Celsius throughout the year, requiring appropriate exposure protection. When diving, maintain careful buoyancy to avoid contact with the seabed and potential entanglement risks associated with the reef structure. Protective gear is recommended to prevent injury from sharp surfaces.

Stack Rocks is a reef dive site located 500 metres from the shore within the Skomer Marine Reserve. The site offers depths ranging from 5 to 25 metres and is suitable for beginners, though conditions vary. Access is by boat only. Divers should be aware of potential hazards including boat traffic, sea urchins, strong currents, and surf. Water temperatures fluctuate throughout the year, ranging from 9C in the winter months to 17C in September. As a marine reef environment, the site provides a varied underwater topography for exploration.

West Hook is a shore-entry dive site located within the Skomer Marine Reserve. The site features a reef and kelp forest environment with an average depth of 9 metres. Divers can expect mild currents and visibility ranging from 5 to 15 metres. Typical dive times are approximately 45 minutes, and the site is suitable for beginners. Night diving is also permitted at this location. Water temperatures fluctuate between 9C and 17C throughout the year. Divers should remain aware of potential hazards, including boat traffic, entanglement risks, and surf conditions near the shore.

Martins Haven is a shore-entry site located within the Skomer Marine Reserve. Divers access the water via a concrete slipway that leads into a rocky bay. The topography features a mix of reefs, walls, and drop-offs, with depths ranging from 6 to 30 metres and an average depth of 14 metres. Conditions include moderate currents and visibility between 10 and 30 metres. The site is suitable for intermediate divers and supports night diving. Hazards to consider include boat traffic, surf, and potential for low visibility. Facilities available at the location include parking, toilets, and guided tours.

Tusker Rock in the Skomer Marine Reserve is a combined wreck and reef site located 3000 metres from the shore. Accessible only by boat, the site features an average depth of 15 metres. Divers should be prepared for strong currents and surf conditions. Marine life recorded at the site includes the common Gray Seal, which is frequently encountered between August and November. Other species observed include the Curled Octopus, Orange-clubbed Nudibranch, Conger Eel, Catshark, and various crustaceans such as the Spiny Spider Crab and Common Lobster. Due to the challenging current conditions, this site is suitable for intermediate divers.

Skomer Marine Reserve offers a diverse underwater environment featuring both reefs and wrecks. Located 1609 metres from the shore, this site requires boat access and is suited for intermediate divers. The topography supports a range of depths from 10 to 45 metres, with an average depth of 15 metres. Divers should be prepared for strong currents and variable visibility ranging from 5 to 25 metres. Water temperatures fluctuate between 9C and 16C due to the convergence of Gulf Stream and Arctic currents. Given the potential for strong currents, surf, and deep sections, this site demands careful planning and experience in cold water environments.