Ha Long, Vietnam offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Ha Long is known for Ha Long Bay, a UNESCO World Heritage Site famous for its emerald waters and thousands of towering limestone islands topped with rainforests. The best time to travel to Ha Long, Vietnam, is from October to April, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 22-25°C (72-77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!