Best Time to Visit Thailand and Vietnam

The best time to visit Thailand and Vietnam together is November to February, when both countries are mostly dry and pleasantly cool. This is the sweet spot for a two-country trip that mixes Thai temples and beaches with Vietnam's headline sights.

Both countries broadly share a dry season, which is why the combination works so well. The main things to plan around are Thailand's two beach coasts, which have opposite rainy seasons, and Vietnam's central coast, which can still be wet in November. For Vietnam's full month-by-month and regional detail, see our guide to the best time to visit Vietnam.

When is the best time to visit Thailand and Vietnam together?

Aim for November to February for the best overall conditions, with December to February the cleanest window for a smooth route. March is a good warmer alternative, though northern Thailand's haze season begins around then. The table below sets Thailand's regions beside Vietnam overall so you can pick a window that works across the whole trip. Treat these as seasonal trends; exact dates shift year to year.

Best time to visit Thailand

The best time to visit Thailand is November to February, the cool, dry season that is comfortable across the whole country. Thailand has three broad seasons: cool and dry (November–February), hot (March–May) and green or rainy (June–October). The catch that trips up most first-timers is that the two beach coasts run on opposite monsoons, so there is almost always good beach weather somewhere.

Bangkok and central Thailand

Best time: November–February. These months bring comfortable temperatures for temples, markets and city sightseeing. March to May turns hot, with Bangkok often above 35 °C (95 °F), while June to October brings short, heavy afternoon showers that rarely derail a day of sightseeing.

Northern Thailand and Chiang Mai

Best time: November–February, when the north is cool, clear and green after the rains. One important caveat: from roughly late February to mid-April, agricultural burning across the north creates heavy haze around Chiang Mai, Chiang Rai and Pai, pushing air quality to unhealthy levels — some of the worst readings hit in March. If the north is a priority, travel November to January rather than spring.

Andaman versus Gulf beaches

Match your islands to your dates — the two coasts peak at different times. The Andaman coast (Phuket, Krabi, Phi Phi) is best November to April, with rough seas and boat cancellations from May to October. The Gulf coast (Koh Samui, Koh Phangan, Koh Tao) is best from around January to August and is driest June to August, but it turns wettest October to December. In short: choose the Andaman side in November–January, the Gulf side in June–September, and either from February to April.

Festivals worth timing your trip around

Two Thai festivals can shape when you go. Songkran, the Thai New Year water festival, falls on 13–15 April nationwide — joyful but very busy, so book transport and hotels well ahead. Loy Krathong and Yi Peng land in November, when floating lanterns fill the water and, in Chiang Mai, the sky; the city sells out months in advance. On the Vietnam side, Tet (Lunar New Year, late January or February) is the biggest holiday, festive but with many closures and heavy domestic travel. Planning around these dates keeps a combined trip smooth.

Chat with us on WhatsApp: +84 936 336 389 — tell us your dates and we'll match your Thailand and Vietnam route to the best weather in both countries.

How Vietnam fits the combined trip

Vietnam's split calendar is the main variable to plan around, because its north, centre and south each run on a different weather clock while Thailand is more uniform month to month. In practice, November to March keeps most of Vietnam dry at the same time as Thailand's cool season, which is why it is the natural window for a two-country trip.

The one caution is Vietnam's central heritage coast — Hue, Da Nang and Hoi An — which is wettest from September to December; time it with the best time to visit Da Nang, Hoi An and Hue. For the full picture across all three Vietnamese regions, use the best time to visit Vietnam guide, and for dry-season sun on the Vietnam side, see the best time to visit Phu Quoc.

Best month for a Thailand and Vietnam itinerary

For a classic two-country trip, November to February is ideal, with March a warmer alternative if you skip northern Thailand. A typical route pairs Bangkok and a Thai beach or Chiang Mai with Vietnam's north, centre and south, connected by a short regional flight.

A popular flow starts in Bangkok, adds either an Andaman beach (Nov–Feb) or Chiang Mai (Nov–Jan), then crosses to Vietnam for Hanoi and Ha Long Bay, the central heritage towns and Ho Chi Minh City. Bangkok connects to both Hanoi and Ho Chi Minh City in around two hours by direct flight, so the crossing costs little travel time and lets you start in whichever country suits your dates best. Booked in the November–February window, this keeps you in dry, comfortable weather across both countries. Browse private Thailand and Vietnam tours we can tailor to your dates, or if you would rather pair Vietnam with Cambodia, see the best time to visit Vietnam and Cambodia.

Traveling in the green season

The green season is the value window, and the two-coast rule keeps a beach in reach. From June to October, prices in Thailand can drop 30–50% and crowds thin out, while rain usually falls as short afternoon bursts rather than all day. When the Andaman coast is wet, the Gulf islands are often dry — and the reverse later in the year.

On the Vietnam side outside the central-coast storm peak, the same logic applies: a flexible private itinerary can be reordered around the forecast so most sightseeing stays dry. For travellers who prioritise value over guaranteed sun, this season offers lush scenery and far lighter crowds across both countries.

Frequently asked questions

What is the best month to visit Thailand and Vietnam together?

November to February is the best overall window, when both countries are mostly dry and cool. December to February is the cleanest for a smooth two-country route, and March is a good warmer alternative if you skip northern Thailand's haze season.

Is November a good time for a Thailand and Vietnam trip?

Yes, with one caveat. Thailand and most of Vietnam are pleasant, but Vietnam's central coast can still be wet in early November. Keeping central-coast time short, or starting later in the month, avoids most disruption.

When is the best time for Thailand's beaches?

It depends on the coast. The Andaman side (Phuket, Krabi) is best November to April, while the Gulf side (Koh Samui, Koh Phangan) is best from around January to August. From February to April, either coast works well.

When should I avoid Chiang Mai?

Roughly late February to mid-April, during northern Thailand's burning season, when agricultural haze pushes air quality to unhealthy levels. For the north, travel November to January instead.

What is the cheapest time for a Thailand and Vietnam trip?

The green season from June to October generally has the lowest prices and thinnest crowds in both countries. Expect heat, humidity and short showers, and use Thailand's two-coast rule to keep a beach in season.

How many days do I need for Thailand and Vietnam?

Around 12 to 14 days covers the headline sights of both countries at a comfortable pace. Shorter trips work by focusing on Bangkok plus one Vietnam region.

Ready to plan a two-country trip around the best weather? Chat with us on WhatsApp: +84 936 336 389 and our local team will design a private Thailand and Vietnam itinerary matched to your dates.