Mukilteo, United States offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Mukilteo is known for the Mukilteo Lighthouse Park and its proximity to the Boeing Future of Flight Aviation Center. The best time to travel to Mukilteo, United States, is during the summer months of June to August, when the average air temperature is around 65-75°F and the water temperature is approximately 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!