Port Henry, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Port Henry is known for its proximity to Lake Champlain and the historic Iron Center Museum. The best time to travel to Port Henry, United States, is in late summer when the average air temperature is around 70-75°F and the water temperature is approximately 65-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!