Bad Gastein, Austria offers 1 beach perfect for sunbathing, surfing, swimming, and more. Bad Gastein is known for its stunning alpine scenery, historic spa resorts, and the iconic Gastein Waterfall. The best time to travel to Bad Gastein, Austria, is from June to September, with average air temperatures ranging from 15°C to 25°C and water temperatures around 20°C. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!