Hanko, Finland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Hanko is known for its beautiful sandy beaches, the Hanko Regatta, and the historic Hanko Water Tower. The best time to travel to Hanko, Finland, is during July when the average air temperature is around 20°C (68°F) and the water temperature is approximately 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!