De Waal, Netherlands offers 1 beach perfect for sunbathing, surfing, swimming, and more. De Waal, North Holland, Netherlands, is known for the Ecomare museum and nature center, which focuses on the Wadden Sea and North Sea ecosystems. The best time to travel to De Waal, Netherlands, is from June to August, with average air temperatures around 17-20°C (63-68°F) and water temperatures around 16-18°C (61-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!