Hoang Mai, Vietnam offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Hoang Mai, Thanh Hoa, Vietnam, is known for its proximity to the scenic Sam Son Beach and the historical Ho Citadel. The best time to travel to Hoang Mai, 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!