Plattsburgh, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Plattsburgh is known for the Battle of Plattsburgh, Lake Champlain, and the Plattsburgh City Beach. The best time to travel to Plattsburgh, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F (21-27°C) and the water temperature in Lake Champlain is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!