Imatra, Finland offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Imatra is known for the Imatrankoski Rapids and the historic Imatran Valtionhotelli. The best time to travel to Imatra, Finland, is during the summer months of June to August, when the average air temperature is around 15-20°C (59-68°F) and the 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!