Boise, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Boise is known for the Boise River Greenbelt, the Basque Block, and the Idaho State Capitol. The best time to travel to Boise is in late spring (May to June) when the average air temperature is around 70-80°F (21-27°C) and water temperature in nearby lakes and rivers is approximately 60-65°F (15-18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!