The Galley Head Lighthouse is an active 19th century lighthouse outside of Rosscarbery, County Cork, on the south coast of Ireland. The lighthouse is situated on Galley Head at the southern end of the headland known as Dundeady island at 133 feet above sea level, overlooking St George's Channel and two beaches, Red Strand to the east and the Long Strand to the west. The headland is cut off from the mainland by the ancient walls of the old Norman stronghold of Dun Deidi, an important fortress of the local O’Cowhig Clan.