Thuy Bac, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Thuy Bac is known for its proximity to the Phong Nha-Ke Bang National Park, a UNESCO World Heritage Site. The best time to travel to Thuy Bac, Vietnam, is from November to April, with average air temperatures around 20-25°C (68-77°F) and water temperatures approximately 24-28°C (75-82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!