Formerum, Netherlands offers 1 beach perfect for sunbathing, surfing, swimming, and more. Formerum is known for the Terschelling Oerol Festival, a unique cultural event that transforms the island into a stage for theater, music, and art. The best time to travel to Formerum, Netherlands, is from June to August, with average air temperatures around 18°C (64°F) and water temperatures around 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!