The park has two beaches that are perfect for swimming, Sand Beach and Echo Lake Beach. Sand Beach, along Park Loop Road, has changing rooms, rest rooms, and a lifeguard on duty from Memorial Day to Labor Day. The water temperature here rarely reaches above 55°F. Echo Lake Beach, on the western side of the island just north of Southwest Harbor, has much warmer water. There are changing rooms, rest rooms, and a lifeguard on duty throughout summer.