Dunkerque, France offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Dunkerque is known for its annual Dunkirk Carnival, the Dunkirk 1940 Museum, and the Operation Dynamo historical event. The best time to travel to Dunkerque, France, is from June to August, 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!