Riverside, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Riverside is known for the Crescent Park Looff Carousel in regard to tourism. The best time to travel to Riverside, United States, is in the spring (March to May) when the average air temperature is around 70°F (21°C) and water temperature is approximately 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!