Roscoff lighthouse, Coastal lighthouse in Roscoff, France

The Roscoff lighthouse is a 24-metre square pyramidal tower on a square base, both of exposed granite masonry, standing beside a keeper's house about 430 metres behind the old harbour lights. Its lower shaft is rendered white with two small rectangular windows, while the upper third shows grey-brown stone courses and a corbelled parapet with a railed platform.

A fixed white light on a cast-iron candelabrum and an iron-sheet hut was set up at the end of the north mole in 1880; a red directional light followed in 1884. Judged too low, a taller tower was planned from 1914, but the First World War suspended work until 1934, when the present 24-metre granite lighthouse entered service 430 metres behind the old lights.

The tower stands beside the keeper's house, and since 2002 it has been automated yet still watched over; in summer it opens to visitors. Its light reaches 15 nautical miles, marking the harbour entrance from within the town itself.

The lighthouse sits at the edge of Roscoff's harbor and is easily accessible on foot from the town center. The best time to visit is during good weather when clear views and good light make it easier to see the structure and take photographs of the surrounding coast.

The National Archives in Paris hold three plans of the Roscoff lighthouse drawn in 1912 and 1913, filed under reference CP/F/14/17513/40. They document the tower designed before the First World War delayed its construction until 1934.