Leavenworth, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Leavenworth is known for its Bavarian-themed village and scenic mountain views. The best time to travel to Leavenworth, United States, is in September when the average air temperature is around 70°F (21°C) and the nearby river water temperature is approximately 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!