Parker, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Parker, Arizona, United States, is known for the Colorado River and the Parker Dam. The best time to travel to Parker, United States, is in the spring (March to May) when the average air temperature is around 70°F (21°C) and the Colorado River 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!