Big Water, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Big Water, Utah, United States, is known for its proximity to Lake Powell and the Grand Staircase-Escalante National Monument. The best time to travel to Big Water, United States, is in late spring or early fall when the average air temperature is around 70°F (21°C) and the water temperature is approximately 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!