Bo Trach, Vietnam offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Bo Trach, Quang Binh, Vietnam, is known for its proximity to the Phong Nha-Ke Bang National Park, home to the famous Son Doong Cave, the largest cave in the world. The best time to travel to Bo Trach, Vietnam, is from February to April, with average air temperatures around 25-30°C (77-86°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!