Grantsburg, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Grantsburg, Wisconsin, United States, is known for Crex Meadows Wildlife Area, a popular destination for birdwatching and nature enthusiasts. The best time to travel to Grantsburg, United States, is in late spring or early fall when the average air temperature is around 60-70°F, and water temperatures in nearby lakes are typically 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!