Bismarck, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Bismarck is known for the North Dakota State Capitol, the Dakota Zoo, and the Lewis and Clark Riverboat. The best time to travel to Bismarck, United States, is from June to August, with average air temperatures around 70-85°F and water temperatures in local lakes around 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!