Valkeakoski, Finland offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Valkeakoski is known for the Rapola Ridge, the largest ancient hillfort in Finland, and the annual Tyovaen Musiikkitapahtuma (Workers' Music Festival). The best time to travel to Valkeakoski, Finland, is during the summer months of June to August, when the average air temperature is around 15-20°C (59-68°F) and water temperature in nearby lakes is approximately 15-18°C (59-64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!