DeHaven, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. DeHaven, California, United States, is known for its proximity to the scenic Pacific Coast Highway and the nearby attractions of the Mendocino Coast. The best time to travel to DeHaven, United States, is during the summer months, with average air temperatures around 70-80°F and water temperatures around 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!