The coastline, which is largely cliff-lined, has a cave on the west coast.

The island is 1,010 metres (5⁄8 mile) long at its longest and 675 m (7⁄16 mi) wide at its widest.

Harlosh Skerry lies just offshore to the north west, upon which seals can be seen frequently.

At low tide on the northern coast there is a large sandy bay, however, watercraft should take caution when attempting to land in the bay as several rock formations pose a navigational hazard at low tide.

The name "Harlosh" is of Old Norse origin and may refer to a river mouth, although the meaning is not clear.