Saint Croix Falls, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Croix Falls is known for the Saint Croix National Scenic Riverway and Interstate State Park. The best time to travel to Saint Croix Falls is in late spring or early fall, with average air temperatures around 60-70°F and water temperatures in nearby lakes around 50-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!