Spring (February to April) and Autumn (August to October) is the best time to visit Vietnam. These months bring in the lowest rainfall across the country. The conditions are ideal for trekking in the mountains, swimming at the beach, and cycling in the countryside. However, Vietnam is a year-round destination; its weather can be split into tropical and temperate zones. While South Vietnam doesn't see any drastic changes in the weather, North Vietnam experiences distinct seasonal variations.
July and August is the high season in Vietnam, being the best time to visit its many beaches. The prices increase during these months, so it's best to make the bookings in advance. December to March is the shoulder season in Vietnam. It is a good time to visit cities like Hanoi and Ho Chi Minh City. The famous Tet Festival of Vietnam is also celebrated in late January or early February and is a great experience for tourists. The low season of April to June & September to November is the best time for exploring Vietnam without the crowds. It is also a good time to visit Halong Bay.