Saint Nazaire, France offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Saint Nazaire is known for the Escal'Atlantic ocean liner experience and the Saint-Nazaire submarine base. The best time to travel to Saint Nazaire, France, is from June to September, when the average air temperature is around 18-22°C (64-72°F) and the water temperature is approximately 17-20°C (63-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!