Keszthely, Hungary offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Keszthely is known for its proximity to Lake Balaton and the historic Festetics Palace. The best time to travel to Keszthely, Hungary, is from June to August, with average air temperatures around 25°C (77°F) and water temperatures in Lake Balaton around 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!