Ljan, Norway offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Ljan, Oslo, Norway, is known for its proximity to the Oslofjord and the scenic hiking trails in the surrounding Nordmarka forest. The best time to travel to Ljan, 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!