Idaho City, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Idaho City is known for its historic Gold Rush-era buildings and the Boise Basin Museum. The best time to travel to Idaho City is during the summer months of June to August, when the average air temperature is around 70-85°F (21-29°C) and water temperatures in nearby lakes and rivers are typically between 60-70°F (15-21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!