Devils Lake, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Devils Lake is known for the Devils Lake State Park and its excellent fishing opportunities. The best time to travel to Devils Lake, 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 is approximately 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!