When to go, and the seasons nobody warns you about
The country runs 1,650 km from north to south and the north, centre and south are never all at their best in the same month. Booking the wrong month costs more than booking the wrong operator.
Three countries wearing one name
The single most useful thing to understand about Vietnamese seasons is that there is no national season. The north has a cool, dry winter and a hot, wet summer. The centre is dry when the north is wet and takes its heaviest rain and its typhoons late in the year. The south runs a simple wet and dry cycle with the rain arriving in intense afternoon bursts rather than settling in for a week.
That means a two week trip covering all three regions is always a compromise. There is no month in which Sapa, Hoi An and the Mekong Delta are all at their best. Pick the region that matters most to you and let the others be what they are, or split the trip across two visits.
| Region | Best months | Worst months | Why |
|---|---|---|---|
| North, including Hanoi, Sapa, Ha Giang, Ha Long | October to early December, and March to April | June to August | Summer is hot, humid and brings the heaviest rain and the storm season |
| Centre, including Hue, Da Nang, Hoi An | February to August | October to November | Central Vietnam takes its heaviest rain and most typhoons late in the year |
| South, including Ho Chi Minh City, Mekong Delta, Phu Quoc | December to April | June to September | The wet season brings daily afternoon rain and rougher water around the islands |
The four traps
Burning season in the northern hills
From late February into April, farmers across the northern uplands clear fields with fire. The haze sits in the valleys for weeks and takes the long views with it. Sapa, Ha Giang and the passes can be entirely white on a technically clear day. Very few operators mention it in advance. If the mountain views are the reason you are going, September to November is the reliable window, and the trekking ranking has more.
Fog and drizzle on Ha Long Bay
The late winter and early spring months bring a persistent light drizzle and low cloud to the northern coast. The bay is still atmospheric, but the photographs you have seen were not taken then. Separately, and at any time of year, the provincial authority suspends departures in storms and high winds, which applies to every vessel in the port regardless of what you paid. Never put a bay cruise on the night before an international flight.
The weeks around Tet
Lunar New Year falls in late January or February and moves each year. For roughly a week either side, domestic transport is full and expensive, many family run restaurants and small operators close, and the whole country is travelling. It is a remarkable time to be in a Vietnamese city and a difficult time to run an itinerary. Decide deliberately which of those you want, and book months ahead either way.
Typhoon season in the centre
The centre takes most of the country's typhoons between roughly September and November. A direct hit is rare for any given week, but the effect on a fixed itinerary is severe: flights cancelled, coastal roads closed, boat trips stopped. If you are travelling then, build a spare day in and buy insurance that covers weather disruption rather than only medical care.
Month by month, roughly
| Months | North | Centre | South |
|---|---|---|---|
| December to February | Cold and often grey, clear cold snaps, good for cities | Cooler and drying out | The best months, dry and warm |
| March to April | Warming and pleasant, but haze from the burning season inland | Good, warm and dry | Hot, building towards the rains |
| May to August | Hot, humid, heaviest rain and storms | Hot and dry, the beach season | Wet season, sharp afternoon rain |
| September to November | The best window, cool, clear, harvest in the terraces | Wettest and the typhoon risk | Rain easing through November |
If you want one answer rather than a table: late October to early December is the strongest single window for a trip that covers the north and the south, and accepts that central Vietnam may be wet. March and April are the second choice, with the haze caveat inland.
Trying to fit a trip into fixed dates?
Tell us your dates and what you want to do, and we will say what actually works in them.
Questions travellers ask most
Is there a month when the whole country is good?
Not really. Late February to April and late October to early December come closest, and both involve a compromise: haze in the northern hills in spring, rain in the centre in autumn.
Anyone telling you a single month works everywhere is describing an average rather than a trip.
How bad is the rain in the south during the wet season?
Usually less disruptive than travellers expect. It tends to arrive as a heavy burst in the afternoon and clear, rather than settling in for days. Boat trips around the islands are the exception, since sea state, not rainfall, decides whether they run.
Should I avoid Tet completely?
Not if you want to see it. Cities during Tet are extraordinary. Just accept that transport is full, prices rise, many small businesses close for several days and itineraries lose flexibility. Book far ahead and keep the plan simple.
When are the Sapa rice terraces green or gold?
The terraces are flooded and mirror-like around May and June, green through the summer, and turn gold before the harvest around September into early October. Those weeks are the busiest of the year in Sapa, so book accommodation early.
Read next
Tell us what you want to do in Vietnam
Dates, party size and the places you care about are enough to start. You get a draft route and an indicative price, not a brochure.