Ban Dong, Laos offers 1 beach perfect for sunbathing, surfing, swimming, and more. Ban Dong, Vientiane, Laos, is known for its proximity to the Nam Ngum Reservoir and the cultural experiences offered by the local Lao communities. The best time to travel to Ban Dong, Laos, is from November to February, with average air temperatures around 20-25°C (68-77°F) and water temperatures approximately 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!