The French coastline has been shaped over several centuries by the installation of numerous lighthouses along its coasts, these majestic sentinels of the seas intended to guide ships and protect the land from outside invasion. It is in this defensive context that a 1st construction was built in 1669 in Saint-Clément-des-Baleines. At the request of Colbert, and as part of the deployment of the defensive system of the Rochefort arsenal, a watchtower made of ashlars was designed by Vauban. In 1854, as maritime traffic increased, a second construction was ordered by the Lighthouses and Beacons service: it is the current monument whose name is inspired by the relatively numerous whales that stranded at this place on the island of Ré at the time.
Still in operation, the Baleines lighthouse and its machine building (also dating from the 19th century) have been classified as historical monuments since 2012 and its 17th century predecessor (also classified in 1904) is now a museum on lighthouses and their history.