Saco, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Saco is known for Funtown Splashtown USA, a popular amusement and water park. The best time to travel to Saco, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the ocean water temperature is approximately 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!