Haitang, China offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Haitang, Hainan, China, is known for the Atlantis Sanya resort and the Haitang Bay Duty-Free Shopping Complex. The best time to travel to Haitang, China, is from November to April, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 23-26°C (73-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!