Dursey Island (Irish: Baoi Bhéarra or Oileán Baoi) lies at the southwestern tip of the Beara Peninsula in the west of County Cork in Ireland. Dursey Island is 6.5 kilometres long and 1.5 kilometres wide. The island is separated from the mainland by a narrow stretch of water, Dursey Sound, which has a very strong tidal race, with the submerged Flag Rock close to the centre of the channel.