Pertisau, Austria offers 1 beach perfect for sunbathing, surfing, swimming, and more. Pertisau is known for its stunning location on Lake Achensee, offering picturesque views and a variety of water sports activities. The best time to travel to Pertisau, Austria, is during the summer months of June to August, when the average air temperature is around 20°C (68°F) and the water temperature of Lake Achensee 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!