Lake Mead, United States offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Lake Mead, Arizona, United States, is known for the Hoover Dam and its vast recreational opportunities on the reservoir. The best time to visit Lake Mead is from March to May, with average air temperatures ranging from 70-85°F and water temperatures around 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!