Hamnavoe, United Kingdom offers 1 beach perfect for sunbathing, surfing, swimming, and more. Hamnavoe, Scotland, United Kingdom, is known for the picturesque St. Magnus Cathedral and the historic Scapa Flow. The best time to travel to Hamnavoe, United Kingdom, is during the summer months of June to August, when the average air temperature is around 12-15°C (54-59°F) and the water temperature is approximately 10-13°C (50-55°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!