Man Thai, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Man Thai, Da Nang, Vietnam, is known for its beautiful beaches and the iconic Marble Mountains. The best time to travel to Man Thai, Vietnam, is from February to April, with average air temperatures around 25-30°C (77-86°F) and water temperatures approximately 25-28°C (77-82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!