Skomer Marine Reserve is defined by an exceptional density and diversity of nudibranch species across its reefs, walls, and kelp forests. The Gray Seal is a frequent companion on dives. Sites range from the shallow, beginner-friendly Hen Chicks to the varied terrain around Dale Pembrokeshire, which adds wrecks and artificial reefs to the mix. Most sites require boat access, and intermediate skill is the norm across the reserve.
Monthly water temperature across Skomer Marine Reserve's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperatures run cool, rising through summer to a peak in September before dropping back through autumn and winter. The warmest months attract the most divers, with visibility typically at its best during this window. Exposed tidal conditions at many sites mean timing dives to slack water is essential.
5 operators
United Kingdom
United Kingdom
United Kingdom
12 more sites to explore
Water temperature around Skomer Marine Reserve ranges from about 9°C in February to 17°C in September, based on satellite sea-temperature data for its dive sites.
In the warm season (about 17°C) a 7mm or semi-dry suit is comfortable in Skomer Marine Reserve; in the coldest months (about 9°C) step up to a drysuit.
Fin maps 16 sites in Skomer Marine Reserve (15 scuba diving sites and 4 snorkelling spots, with some suited to both).
Across Skomer Marine Reserve's dive sites, May, June, July and August are most often reported as the best months to visit.
Nudibranchs dominate the species list here, with Antiopella Cristata, Slender Facelina, Favorinus branchialis, the Fourline Nudibranch, and Gargamella Rosi all observed very commonly across sites. The Curled Octopus, Violet Sea Slug, and Fried Egg Nudibranch are also regularly encountered. The Gray Seal is a highlight and is seen on dives throughout the reserve.
Most sites are pitched at intermediate level, requiring some experience with tidal conditions and boat diving. Hen Chicks is the clearest exception, offering shallower depths and mild currents that make it accessible to beginner divers. Those new to the area are well served by the local operators, including West Wales Diving School and West Wales Divers.
The majority of sites require boat access, and several operators including Pembrokeshire Boat Charters, Pembrokeshire Dive Charters, and West Wales Dive Company run charters in the area. High Point North is a notable exception, being accessible from shore. Tidal planning is important for most sites regardless of entry type.
Dale Pembrokeshire offers the widest variety of terrain, combining reefs, walls, kelp forest, wrecks, and artificial reefs in a single area. Skomer Island itself focuses on reefs and wrecks at intermediate depths. High Point North is a shore dive working a reef and wall at moderate depth, while Hen Chicks suits beginners with its shallower, calmer conditions.