Castricum, Netherlands offers 1 beach perfect for sunbathing, surfing, swimming, and more. Castricum is known for its beautiful beaches, the North Holland Dune Reserve, and the historic Bakkum campsite. The best time to travel to Castricum, Netherlands, is from June to August, with average air temperatures around 18-22°C (64-72°F) and water temperatures around 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!