[1] The Marstein Lighthouse currently consists of a 17-metre (56 ft) tall square, white, masonry tower with a red roof, and a single-storey service building attached.

During World War II, the island and lighthouse were occupied by German forces.

Allied aircraft bombed the lighthouse on two occasions, 25 July and 1 August 1940, and caused considerable damage.

From 1949 to 1950, a new square light tower, a new keeper's house, and a new surrounding, protective, bulkhead were built.

In January 2005, a severe storm breached the bulkhead wall and destroyed the keeper's house.