Fenton, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Fenton, Missouri, United States, is known for the Fenton City Park and the nearby Gravois Bluffs shopping area. The best time to travel to Fenton, United States, is in late spring (May to June) when the average air temperature is around 65-75°F, and water temperatures in nearby lakes are typically around 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!