Trondheim, Norway offers 1 beach perfect for sunbathing, surfing, swimming, and more. Trondheim is known for its historic Nidaros Cathedral, a major pilgrimage site and architectural landmark. The best time to travel to Trondheim, Norway, is from June to August, when the average air temperature is around 15°C (59°F) and the water temperature is approximately 13°C (55°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!