The low island of Stromay lies between two wide, shallow sea lochs, Loch Mhic Phàil and Loch Aulasary.[4] Stromay is joined to North Uist for most of the tidal cycle.
A smaller islet of the same name lies between Harris and Ensay,[5] and another (Stròmaigh) between North Uist and Kirkibost.[3]
There are extensive sands and rocks offshore that are exposed at low tide.[6]
^Rick Livingstone’s Tables provide an area of 100 hectares (250 acres), which may include the inter-tidal zone. Rick Livingstone’s Tables of the Islands of Scotland (pdf) Argyll Yacht Charters. Retrieved 12 Dec 2011.