Fornebu, Norway offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Fornebu is known for the Telenor Arena, a major venue for concerts and events. The best time to travel to Fornebu, Norway, is during the summer months of June to August, when the average air temperature is around 18°C (64°F) and the water temperature is approximately 16°C (61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!