Phare de la Teignouse, Maritime lighthouse in Quiberon Bay, France

Phare de la Teignouse is a white cylindrical lighthouse built on an isolated rocky reef in Quiberon Bay, off the coast of Brittany. The tower sits on a cone-shaped base and rises about 54 feet (16 meters) to a lantern room at the top.

Construction of the lighthouse began in 1843, and it entered service on 1 January 1845. In the 1970s it was electrified using a wind generator, and after full automation the last keepers left in July 1983. The wind generator has since been replaced by photovoltaic panels.

The lighthouse takes its name from the reef it stands on, La Teignouse, a name that local sailors have used for generations to refer to this stretch of difficult water. Fishermen and sailors from the Quiberon Peninsula still use its flashing light as a reference when heading toward the islands of Houat and Hoëdic.

The lighthouse can only be reached by boat, and getting close depends on sea conditions since the reef is exposed to strong tidal currents. It remains an active aid to navigation, so visits aboard are not always possible, but it can be seen clearly from boat tours around the Quiberon Peninsula.

The tower doubles as an AIS station (MMSI 992271007), letting vessels fix its bearing electronically. Its light shows white over 15 nautical miles and red over 11, flashing every four seconds from a height of 20 metres. The wind generator that electrified it in the 1970s has since been replaced by solar panels.