Nynashamn, Sweden offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Nynashamn is known for its picturesque archipelago and ferry connections to Gotland. The best time to travel to Nynashamn, 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!