Jenny Lake, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Jenny Lake, Wyoming, United States, is known for its stunning location in Grand Teton National Park and offers breathtaking views of the Teton Range. The best time to visit Jenny Lake is from June to September, with average air temperatures ranging from 50°F to 80°F and water temperatures around 60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!