Chiswell Islands, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Chiswell Islands is known for the Alaska Maritime National Wildlife Refuge, which offers opportunities for wildlife viewing, particularly of seabirds and marine mammals. The best time to visit the Chiswell Islands is during the summer months of June to August, when the average air temperature is around 55-65°F (13-18°C) and the water temperature is approximately 50°F (10°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!