Marine on Saint Croix, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Marine on Saint Croix, Minnesota, United States, is known for William O'Brien State Park and the historic Marine Mill. The best time to travel to Marine on Saint Croix, United States, is in late spring or early fall when the average air temperature is around 60-70°F, and the water temperature in nearby lakes is approximately 60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
