Eagle, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Eagle, Idaho, United States, is known for its scenic outdoor recreational opportunities and family-friendly community events. The best time to travel to Eagle, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and water temperatures in nearby lakes and rivers are typically 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!