Ha Duong, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Ha Duong, Quang Binh, Vietnam, is known for its proximity to the Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site. The best time to travel to Ha Duong, Vietnam, is from October to December, with average air temperatures around 20-25°C (68-77°F) and water temperatures approximately 24-26°C (75-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!