Oslo, Norway offers 17 beaches perfect for sunbathing, surfing, swimming, and more. Oslo is known for the Viking Ship Museum, the Munch Museum, and the Oslo Opera House. The best time to travel to Oslo, Norway, is from June to August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 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!