Soay Beag (Scottish Gaelic: Sòdhaigh Beag) is a small, uninhabited tidal island in West Loch Tarbert, between the northern and southern parts of Harris. Soay Beag is separated from the southwest coast of North Harris by the Soay Sound. The island is located immediately to the northwest of the larger Soay Mòr, which is accessible on foot at low tide.