Borve Castle, also known as Castle Wearie, and Caisteal Bhuirgh in Scottish Gaelic, is a ruined 14th century tower house, located at the south-west of the island of Benbecula, in the Western Isles of Scotland. MacGibbon and Ross attributed the building of the tower to Amie mac Ruari, wife of John of Islay, and dated it to between 1344 and 1363. It was occupied by the Macdonalds of Benbecula until the early 17th century.
The ruined tower measures 18m by 11m, and 9m high. The walls are up to 2.7m thick. The entrance, in the south wall, led into the second of three storeys. The ruins are protected as a Scheduled Monument.