Douarnenez, France offers 1 beach perfect for sunbathing, surfing, swimming, and more. Douarnenez is known for its picturesque Port Rhu, the Tristan Island, and the Port-Musee. The best time to travel to Douarnenez, France, is from June to September, with average air temperatures around 15-20°C (59-68°F) and water temperatures around 16-18°C (61-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!