The best time to visit Nam Duong Beach is during the dry season, which typically runs from November to April. During this time, the weather is sunny and pleasant, with temperatures ranging from 25 to 30 degrees Celsius. The sea is calm, making it perfect for swimming and water activities. The shoulder seasons of May to June and September to October are also good times to visit, as the weather is still favorable and there are fewer tourists. However, it's important to note that Nam Duong Beach can get crowded during the peak tourist season of July and August. If you prefer a quieter and more peaceful experience, it's best to avoid these months. Plan your work trip accordingly to make the most of your time at Nam Duong Beach.