Renton, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Renton is known for the Boeing Renton Factory and the nearby Gene Coulon Memorial Beach Park. The best time to travel to Renton, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature in nearby lakes is approximately 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!