La Grande Motte, France offers 13 beaches perfect for sunbathing, surfing, swimming, and more. La Grande Motte is known for its unique modernist architecture designed by Jean Balladur. The best time to travel to La Grande Motte, France, is from June to September, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!