Dun Laoghaire sits on Dublin Bay in the Irish Sea and serves as the main base for diving in and around the capital. Sites in the database include Sandycove Beach, Ireland's Eye, Scotsman's Bay, and Bullock Harbour, covering reef, kelp forest, and artificial reef environments. Depths across the area are moderate, making most sites accessible to beginners and intermediate divers. The water is cold for much of the year, warmest in late summer, with visibility that varies considerably depending on conditions. A well-established operator network supports the area year-round, with boats typically active from spring through autumn.
Monthly water temperature across Dun Laoghaire's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
The Irish Sea keeps temperatures cold from autumn through to late spring, with the warmest water arriving in late summer. Visibility is variable and can be affected by conditions in Dublin Bay, so local knowledge or an operator familiar with the sites is useful when planning a dive.
18 operators
Dun Laoghaire, Ireland
Rathcoole, Ireland
Ballinteer, Ireland
Water temperature around Dun Laoghaire ranges from about 9°C in January to 16°C in August, based on satellite sea-temperature data for its dive sites.
In the warm season (about 16°C) a 7mm or semi-dry suit is comfortable in Dun Laoghaire; in the coldest months (about 9°C) step up to a drysuit.
Fin maps 8 sites in Dun Laoghaire (8 scuba diving sites and 3 snorkelling spots, with some suited to both).
7 more sites to explore
