Unalaska, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Unalaska is known for the Dutch Harbor, a major commercial fishing port and a popular destination for those interested in the history of World War II in the Aleutian Islands. The best time to travel to Unalaska is from June to August, with average air temperatures around 50-60°F and water temperatures near 45-50°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!