Athol, United States offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Athol, Idaho, United States, is known for Silverwood Theme Park. The best time to travel to Athol, United States, is in late spring or early fall when the average air temperature is around 60-70°F, and the water temperature in nearby lakes is approximately 60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!