Mina, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Mina, South Dakota, United States, is known for Mina Lake Recreation Area. The best time to travel to Mina, United States, is during late spring or early fall when the average air temperature is around 70°F (21°C) and water temperatures in nearby lakes are typically in the mid-60s°F (around 18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!