Vinh Thach, Vietnam offers 1 beach perfect for sunbathing, surfing, swimming, and more. Vinh Thach, Quang Tri, Vietnam, is known for the Vinh Moc Tunnels, a historical site from the Vietnam War. The best time to travel to Vinh Thach, Vietnam, is from February to April, when the average air temperature is around 25-30°C (77-86°F) and the water temperature is 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!