Nas, Sweden offers 1 beach perfect for sunbathing, surfing, swimming, and more. Nas, Varmlands lan, Sweden, is known for the Munkfors Mill and the Klaralven River. The best time to travel to Nas, 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°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!