Phong Dien, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Phong Dien is known for the Bach Ma National Park and the Thanh Tan Hot Springs. The best time to travel to Phong Dien, Vietnam, is from December to February, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 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!