Bjornomalmen och Klacknaset, Sweden offers 1 beach perfect for sunbathing, surfing, swimming, and more. Bjornomalmen och Klacknaset, Stockholms lan, Sweden, is known for its proximity to the Stockholm Archipelago and the Tyresta National Park. The best time to travel to Bjornomalmen och Klacknaset, Sweden, is during the summer months of June to August, when the average air temperature is around 15-20°C (59-68°F) and the water temperature is approximately 15-18°C (59-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!