McKinleyville, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. McKinleyville, California, United States, is known for the nearby Redwood National and State Parks. The best time to travel to McKinleyville, United States, is from June to September, with average air temperatures around 60-65°F and ocean temperatures near 52-55°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!