Rockanje, Netherlands offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Rockanje is known for its beautiful beaches and the nearby Voornes Duin nature reserve. The best time to travel to Rockanje, Netherlands, is from June to August, with average air temperatures around 20°C (68°F) and water temperatures around 18°C (64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!