Eclipse Island Lighthouse, lighthouse in Western Australia

Eclipse Island Lighthouse is a reinforced concrete tower standing on a small rocky island off the south coast of Western Australia. Built with a cylindrical shape, the structure rises about 14 meters and now operates with an automated beacon that flashes three times every 12 seconds, visible from up to 15 nautical miles at sea.

Eclipse Island Lighthouse was built in 1926 as a cylindrical concrete tower, initially a staffed light burning kerosene through a first order Fresnel lens. In 1976 the lantern was removed entirely and the optic went on display at the Western Australian Museum. The light now shines from a mast atop the concrete trunk, giving a group of three flashes every twelve seconds from a focal plane 117 metres above sea level.

The lighthouse once housed keeper families who lived and worked together in isolation on the island. Their daily routines, dependence on supply boats, and connection to maritime safety shaped the community and remain part of the area's local memory.

The lighthouse precinct holds three brick family quarters with fibro roofing, outbuildings, concrete tanks and bases, a generator shed, a helipad and a concrete landing. A trestle-based light gauge railway and cable towers, all built in the interwar period, remain on the island. The light now shines from a mast atop the concrete trunk, three flashes every twelve seconds from 117 metres above sea level.

The first-order Fresnel lens removed from the lantern in 1976 is not lost: it went on display at the Western Australian Museum. The light now shines from a mast mounted on the concrete trunk, giving a group of three flashes every twelve seconds from a focal plane 117 metres above sea level.