Dien Duong, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dien Duong is known for its proximity to the UNESCO World Heritage Site of Hoi An Ancient Town. The best time to travel to Dien Duong, Vietnam, is from February to April, with average air temperatures around 25-30°C (77-86°F) and water temperatures approximately 26-28°C (79-82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!