Les Moutiers en Retz, France offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Les Moutiers en Retz is known for its proximity to the scenic Jade Coast and the historic Saint-Brevin-les-Pins. The best time to travel to Les Moutiers en Retz, France, is from June to September, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-21°C (64-70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!