Monster, Netherlands offers 1 beach perfect for sunbathing, surfing, swimming, and more. Monster is known for its beautiful beaches and the nearby Westland greenhouses. The best time to travel to Monster, Netherlands, is from June to August, with average air temperatures around 18-22°C (64-72°F) and North Sea 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!