Marseillan Plage, France offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Marseillan Plage, Occitania, France, is known for its proximity to the Canal du Midi and the Etang de Thau. The best time to travel to Marseillan Plage, France, is from June to September, with average air temperatures around 75°F (24°C) and water temperatures around 72°F (22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!