Mesquer, France offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Mesquer is known for its picturesque beaches and the scenic salt marshes of the Briere Regional Natural Park. The best time to travel to Mesquer, France, is during the summer months of June to August, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!