Saint Francis, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Francis, Wisconsin, United States, is known for its proximity to Lake Michigan and the scenic Seminary Woods. The best time to travel to Saint Francis, United States, is in late spring (May), when the average air temperature is around 65°F (18°C) and water temperature is approximately 55°F (13°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!