Williams Bay, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Williams Bay is known for Yerkes Observatory and its scenic views of Geneva Lake. The best time to travel to Williams Bay, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature in Geneva Lake is approximately 70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
