De Haan, Belgium offers 7 beaches perfect for sunbathing, surfing, swimming, and more. De Haan is known for its Belle Epoque architecture and the historic tramway that runs along the Belgian coast. The best time to travel to De Haan, Belgium, is from June to August, with average air temperatures around 18-22°C (64-72°F) and sea temperatures around 17-19°C (63-66°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!