Manzanita, United States offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Manzanita, Oregon, United States, is known for Neahkahnie Mountain and its scenic beach. The best time to visit Manzanita, United States, is from June to September, with average air temperatures around 65-70°F and water temperatures near 55-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!