Maureen Sweeney, the lighthouse keeper's wife, recorded the vital weather observations in 1944 that prompted General Eisenhower to postpone the D-Day invasion due to incoming storms.
The lighthouse is constructed from distinctive local gray granite, which was quarried from the nearby Fallmore area.
It is one of the few lighthouses in Ireland that still features an original, though now electrified, Fresnel lens system.
The light is categorized as a white occulting light, meaning it has a steady beam that is periodically eclipsed by darkness.
Blacksod Bay, which the lighthouse oversees, is a designated Special Area of Conservation due to its diverse marine wildlife and bird populations.
Blacksod Lighthouse is a granite-built lighthouse located at the southernmost tip of the Erris Peninsula in County Mayo, Ireland. Constructed in 1864, it remains a fully operational aid to navigation managed by the Commissioners of Irish Lights. The site is notable for its historic role in weather reporting, specifically providing the crucial data that led to the delay of the D-Day landings in June 1944. The lighthouse tower stands 13 meters high and is situated on a rocky outcrop overlooking the Atlantic Ocean and Blacksod Bay. Visitors can access the interior via guided tours that detail the maritime history and the living conditions of past keepers. The structure was built using local granite sourced directly from the surrounding area. It serves as a prominent landmark on the Wild Atlantic Way coastal route. The lighthouse complex includes the keeper's house, which has been preserved to reflect its 19th-century origins.
The elevated path looking back toward the lighthouse with the Atlantic surf and the neighboring islands in the background.
Wear sturdy, windproof clothing as the exposed coastal location experiences significant, unpredictable gusts.
Book guided tour slots well in advance during peak summer months, as capacity is limited.
Check local weather reports before departing, as access to the peninsula can be impacted by severe Atlantic storms.
Do not attempt to drive beyond the designated parking area or venture onto the private grazing lands surrounding the lighthouse grounds.
Tours are seasonal and typically operate from spring through autumn; the site is generally closed to public tours during the winter months.
Respect the restricted areas marked for staff use and do not climb on the exterior masonry or surrounding rock formations.
