Vaddo, Sweden offers 1 beach perfect for sunbathing, surfing, swimming, and more. Vaddo, Roslagen, Sweden, is known for the Grisslehamn ferry port and the Albert Engstrom Museum. The best time to travel to Vaddo, Sweden, 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!