Such a Pretty Little Beach(1949)

Original title: Une si jolie petite plage

During the cold and rainy off-season a man arrives in a seaside town and, giving his name only as Pierre, checks into the only hotel which remains open. His arrival arouses curiosity and a degree of suspicion, as people note that he appears to know the area, yet gives no explanation for his presence at that bleak time of year in the dead-end town.