Hoang Hai Beach, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Thanh Hoa is known for Sam Son Beach and the Ho Dynasty Citadel. The best time to visit Hoang Hai Beach, Vietnam, is from December to April, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 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!