Vietnam stretches more than 1,600 km from the mountains on the Chinese border to the Mekong Delta, so it never has one single weather pattern. When Hanoi is cold and grey in January, Phu Quoc is at its sunniest. When central Vietnam is flooded in November, the north is having its clearest, most beautiful month of the year.
That is good news: there is no bad time to travel, only bad combinations of month and region. This guide breaks the year down month by month so you can pick dates first and let the route follow, which is how we plan every private itinerary.
The three climates you are choosing between
- Northern Vietnam (Hanoi, Halong Bay, Sapa, Ninh Binh) has four seasons. Cool, dry winters from November to March, hot and humid summers from May to September.
- Central Vietnam (Hue, Da Nang, Hoi An) is hot and dry from February to August, then takes the brunt of the rain from late September to November.
- Southern Vietnam (Ho Chi Minh City, the Mekong Delta, Phu Quoc) has just two seasons: dry from November to April, and a wet season from May to October with short, heavy afternoon downpours.
A two-week trip usually touches all three, so we sequence the regions to follow the good weather rather than fighting it.
Month by month
January and February
Peak season in the south and the driest, brightest stretch on the beaches. Hanoi is 15–20°C and can feel damp, but Halong Bay is often crisp and clear. Sapa is cold, sometimes near freezing at night, with mist that either ruins or makes the rice terrace views. Tet, the Lunar New Year, falls in one of these two months: the country is at its most festive but domestic transport and hotels fill up months ahead, so book early.
March and April
Our favourite window overall. Warm and dry almost everywhere, low humidity in the centre, calm seas for cruising, and the north is green again. If you only get one shot at Vietnam, this is the safest bet — see how it fits into an 11-day luxury Vietnam itinerary.
May and June
Hot. Hanoi and Ho Chi Minh City hit the mid-30s with high humidity, and the southern wet season starts. Beach weather in the centre is excellent, and Phu Quoc is still pleasant early in the wet season. Good value: rates drop and sites are quieter. We shift sightseeing to early morning and put the afternoons in the pool.
July and August
The northern summer, and school-holiday high season for domestic travel. Expect heavy but short rain in the north and south, and the best weather of the year in Hue, Da Nang and Hoi An. Halong Bay is warm for swimming; the risk is the occasional tropical storm, which is why we keep cruise nights flexible and hold a fallback day. Sapa’s rice terraces are at their greenest.
September and October
September is a quietly brilliant month in the north: clear skies, comfortable temperatures, the rice harvest turning Sapa and Mu Cang Chai gold. From late September the centre becomes the problem — rain builds and Hoi An can flood in October. We usually route these months as north plus south, saving the centre for another trip.
November and December
The north is dry and cool, which makes for a superb Halong Bay cruise as long as you pack a jacket for the deck — for example a two-day Orchid Cruise. The south moves into its dry season, and by December the beaches are at their best. Central Vietnam clears through November.
So when should you actually go?
- Best all-round months: March, April, October and November.
- Best for beaches: January to April for Phu Quoc and the south, June to August for Da Nang and Hoi An.
- Best for the north and Sapa: September and October for the harvest, March and April for spring.
- Best value: May, June and September, when rates soften and the big sites are noticeably emptier.
- Most atmospheric: Tet, if you accept that some restaurants and family businesses close for several days.
How we plan around the weather
Three practical habits make a difference. First, we sequence regions so you move with the dry season instead of against it. Second, we build one flexible day into any itinerary with a cruise or an internal flight in storm season, so a delay costs you a beach afternoon rather than the whole trip. Third, we book cruises and mountain lodges on refundable terms during the shoulder months.
Tell us your dates and we will tell you honestly what they are good for — and what we would move. Send us a note through the contact page and you will have a draft itinerary within 24 hours.
CTour DMC Vietnam — planning team
We are a licensed Destination Management Company based in Vietnam, designing private journeys across Vietnam, Cambodia and Laos since 2010. This guide was written by the planners and local guides who run these trips on the ground, and is reviewed against current conditions before publication. More about our team · Ask us a question
Published 25 August 2026 · last reviewed 5 September 2026 · 790 words · 4 min read