Lewisville, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Lewisville is known for Lewisville Lake, a popular destination for boating, fishing, and outdoor recreation. The best time to travel to Lewisville, United States, is in late spring (May), when the average air temperature is around 75°F (24°C) and the water temperature in nearby lakes is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!