Maryhill, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Maryhill, Washington, United States, is known for the Maryhill Museum of Art and the nearby Stonehenge replica. The best time to travel to Maryhill, United States, is in late spring or early fall when the average air temperature is around 70°F and the Columbia River water temperature is approximately 60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!