Erraid is a tidal island approximately one mile square located in the Inner Hebrides of Scotland. It lies west of Mull and southeast of Iona. The island receives about 1,000 millimetres (40 in) of rain and 1,350 hours of sunshine annually, making it one of the driest and sunniest places on the western seaboard of Scotland. It is attended by numerous uninhabited small islets, the largest being Eilean Dubh, Eilean nam Muc, Eilean Chalmain, Eilean Ghomain and Eilean na Seamair.