Saint Martin de Re, France offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Martin de Re, Nouvelle Aquitaine, France, is known for its Vauban fortifications, a UNESCO World Heritage Site. The best time to travel to Saint Martin de Re, 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 19-22°C (66-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!