Millstatt, Austria offers 1 beach perfect for sunbathing, surfing, swimming, and more. Millstatt is known for Millstatter See, a picturesque alpine lake, and the historic Millstatt Abbey. The best time to travel to Millstatt, Austria, is from June to August, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!