Bannock, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Bannock, Idaho, United States, is known for the Bannock State Park, which preserves the historic ghost town of Bannock. The best time to travel to Bannock, United States, is during the summer months of June to August, when the average air temperature is around 70-85°F, and water temperatures in nearby lakes and rivers can range from 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!