Montrelais, France offers 1 beach perfect for sunbathing, surfing, swimming, and more. Montrelais is known for its proximity to the Loire Valley, a UNESCO World Heritage site famous for its historic chateaux and vineyards. The best time to travel to Montrelais, France, is during late spring to early autumn (May to September) when the average air temperature ranges from 15°C to 25°C (59°F to 77°F) and the water temperature in nearby rivers is around 15°C to 20°C (59°F to 68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!