With Laos being Southeast Asia’s only landlocked country, it’s a little easier to work out when would be the best time to visit. Laos doesn’t have any scuba diving or ocean-going ferries, so you don’t have to worry about the sea conditions. But with its myriad waterfalls and the mighty Mekong, you should still pay attention to the amount of water that is falling from the sky as the seasons cycle through their yearly patterns.
Ultimately though, the best time to travel to Laos will depend on the principal purpose of your trip. Whether you fancy trekking through the lush Laotian jungle, meandering along the Mekong, marvelling at powerful waterfalls, or soaking up Laos’ culture at one of its colourful festivals, we’ll have a look at the Laos climate and help you work out when the best time will be for your travel itinerary.
Laos climate overview
In overly simplistic terms, the Laos climate is – similarly to its Southeast Asian neighbours – divided into a wet season and a dry season, depending on which way the tropical monsoon winds are blowing. Broadly speaking, you can expect October through till April to be dry, with May till September being the Laos rainy season.
In terms of rainfall, Laos doesn’t get as much as some of its neighbours, but its many mountains ensure it gets enough rain to keep its dense jungles green and vibrant. And enough to put a damper on your travel plans if you haven’t paid attention to the patterns and quirks of the Laos climate.
Traditionally, the locals talk of three seasons – wet, cool, and hot:
- Monsoon season (May–September): This period is the traditional Laos wet season. These wet months will mean high water levels in the Mekong and plenty of water pulsing over the country’s many waterfalls. However, trekking will be less appealing at this time, with washed-out muddy trails and leeches out in force.
- Dry & cool season (October–February): In October the rains tend to ease off, but it’s wise to treat this month as a transitional month (although prices can be a little lower). The months from November through February are considered the best time for many activities. This is the cool season, with pleasant temperatures. There’s still plenty of water making its way down from the mountainous regions to the waterfalls, and the jungle trails are drying up and easier to navigate.
- Dry & hot season (March–May): As we cycle back towards the beginning of the next Laos monsoon season, the temperatures start to ramp up. While it’s still dry before the winds switch direction, the searing heat can make it uncomfortable for some outdoor activities (especially trekking).
But please remember, these are only guidelines. During the Laos wet season, there will still be plenty of glorious days. This time of year is just when the rainfall is more concentrated, but often it all falls late in the afternoon in one huge-but-brief downpour after blue skies and sunshine throughout the day. However, you could get unlucky on a trip at this time of the year and get a week of steady rain. But that’s why the prices tend to be a little lower too…
Laos monsoon season: what to expect
As in other Southeast Asian destinations, the monsoon season gets a lot of bad press. Especially when referred to as the ‘rainy season‘ or the ’wet season’. While it is true that this time of year is both wetter and rainier than the rest of the year, you still have plenty of sun-drenched days.
During the Laos wet season, the rain may fall most days, but the majority of it will fall in the late afternoon – around 5 p.m. This means that you can still head out exploring during the day, and as you return to your accommodation to shower and get ready to head out for your evening meals, there will be a huge downpour. This downpour lowers the temperature to a more comfortable level for the evening, and it only usually lasts an hour or so. The cooler air after the rain makes eating and sleeping a little bit more comfortable too.
Can you get unlucky with the weather?
While a late afternoon downpour is the norm, it can rain at any time of the day during this period, though. Occasionally, you will also get some early morning rain. If this early morning shower is followed by clear skies and bright sunshine, you can expect the day to be quite humid too.
During the Laos monsoon season, the weather is a little less predictable, though. During the drier months of the year rain is very rare – rare enough to not be something to worry too much about. However, with the rainy season, you can still get unlucky. This is more pertinent for those planning shorter trips to the country, as you may get a stormy period when it does rain all day for a few days running. Conversely, though, you may get lucky and not only pick a dry spell with only evening rain, but also you would get to enjoy lower accommodation and trip prices, plus fewer tourist crowds.
Making the most of the monsoon
So, what should you expect during the Laos monsoon season? Unpredictable weather would be the best way to describe it. It’s definitely not the best time to go if you want to trek through the jungle, but it can be fine for cruising down the Mekong (the dry and wet days offering different perspectives on Laotian life) or exploring the temples and markets in Luang Prabang or Vientiane. It’s a good idea to have a plan B during the monsoon time – if you planned an outdoor activity, also have an alternative plan that offers a bit more cover from the elements at hand.
Best time to visit Laos, month by month
January–February
January and February are often seen as the best time to travel to Laos. The climate is cool and pleasant, with daytime temperatures averaging around 24–28°C. In the northern highlands, including Luang Prabang, the mornings can be surprisingly crisp, occasionally dipping to 10°C, providing a refreshing change from the usual Southeast Asian heat.
During these months, with river levels still high from the previous rains, this is the prime time for a slow-boat journey down the Mekong. January and February are also good for making the best of the cooler temperatures and reduced rainfall by hitting the trekking trails in the north of the country. The paths will be firmer underfoot, there’ll be fewer leeches to worry about, and the jungle will still be lush following the Laos rainy season.
This time of the year is perhaps the best all around, and January and February are a great time for an expansive tour of the whole country.
March–April
March and April are the hottest months of the year, with temperatures often pushing the mercury above 35°C. While the landscape becomes parched, with waterfalls diminishing to a trickle in some cases, this period is culturally the most vibrant due to the Laos New Year celebrations. As in Thailand, in mid-April, the entire country engages in a massive, friendly water fight to wash away the previous year’s bad luck. Luang Prabang is the most atmospheric place to soak up these festivities.
While the waterfalls may not be at their best, Laos’s many caves offer a perfect, shady respite from the heat. Head to the underground systems like Kong Lor Cave, Pak Ou Caves, or the caves of Vang Vieng to escape the midday sun.
While hotter than January and February, March and April can also be a good time to head to the north of Laos. The higher altitudes in the north are still cooler than the south of the country, and the trekking trails will be very firm underfoot. But be aware that just before the rains start, the farmers burn their fields. This burning season can fill the air with smoke and make for an unpleasant experience at times.
May–September
Often referred to as “green season” instead of the wet season, May through September is the monsoon period. While it rains frequently, downpours are usually short and heavy, occurring in the late afternoon or early evening. The big trade-off is the scenery: the dust disappears, and the countryside turns a vibrant emerald green; it’s the perfect time to snap photos of the rice paddies.
This time of the year is also when Laos’ waterfalls, like Kuang Si and Khone Phapeng waterfalls, are at their most powerful and spectacular.
The green season is also best for avoiding the crowds and getting more bang for your buck with the lower prices.
October–December
While October can be a little hit and miss as the monsoon subsides, the drier and cooler air of November and December sees the tourist numbers on the increase. It’s a great time of the year to visit Vang Vieng – often seen as the adventure hub of Laos. Here you can enjoy the dry weather by hiking to Nam Xay Viewpoint or Pha Ngern Viewpoint, tubing down the river with a cold Beerlao in your hand, or scaling the limestone karsts with some of Asia’s best rock climbing.
This time of the year is also good for trips down the Mekong or to visit the waterfalls. The waterfalls will still be very powerful during these months that follow the heavy rains of the monsoon. With that in mind, these months can be the best time of year to head to the south of the country. Not only can you explore the river archipelago of the 4,000 Islands, but you can also marvel at the Khone Phapeng waterfall near the border with Cambodia. Khone Phapeng, at almost seven miles wide, is the widest waterfall in the world!
Laos weather by region: does it make a difference?
The short answer is yes. The higher altitude in the north makes the hotter months more bearable. The southern areas can get too hot for some during March and April. And the central areas offer a happy medium.
For the north, November to February is the best time. This is the only time you’ll experience cool weather in Laos; at high mountain altitudes, overnight temperatures can drop to 5°C. It’s the best window for trekking through jungle villages without the stifling humidity. However, be wary of March and April here – the burning season creates a thick smoky haze that can ruin those famous mountain vistas and make breathing uncomfortable. Not ideal for trekking!
Central Laos is best visited from November to March for dry, manageable heat. But if you are coming for adventure, the green season is a spectacular alternative. While the north gets muddy, the limestone karsts of Vang Vieng turn a vivid, surreal green, and the lagoons are at their most refreshing.
The South is consistently the hottest region. To avoid the 40°C peaks of April, stick to October to January. This is the prime time for the Bolaven Plateau, where the elevation offers a “microclimate” that stays cool even when the Mekong valleys are sweltering. This is also a great time to visit Khone Phapheng at its most powerful and to enjoy the Laotian ‘beach life’ on the 4,000 islands.
Read more: What to do in Laos: places to go and sites to take in
Laos festivals: plan your trip around them
If you are looking for certain cultural experiences during your visit to Laos, you may be hoping to take in one or more of Laos’ vibrant festivals. While the dates tend to vary very little, as they are largely based on the lunar calendar, here’s a list of the main ones and when they take place so you can have a good idea of what the weather will be like during them:
Bun Pi Mai (Lao New Year) – April
Similar to Songkran in Thailand, the Laotian New Year celebrations see the whole country engage in a friendly water fight. The water is said to wash away last year’s bad luck and help bring the new year in with a clean slate. The festivities are in mid-April each year, and the water fight offers welcome respite from the rising temperatures before the onset of the Laos wet season.
Bun Bang Fai (Rocket Festival) – May
The Rocket Festival signals the end of the dry season; villages gather to launch huge bamboo rockets into the sky to “call for rain” from the heavens. It is a wild, noisy, and high-energy festival filled with traditional music and dancing, as well as the homemade rocket competition. Many cite Vientiane as the best place to be for this one.
That Luang Festival – November
Held at the golden Pha That Luang stupa in Vientiane, this is the most significant religious pilgrimage in Laos. Thousands of monks gather to receive alms from devotees, followed by a week of candlelit processions, fireworks, and a massive trade fair. Being held in November, it’s a popular festival for tourists, as it takes place at the beginning of high season, when the weather is dry and cool.
Wat Phou Festival – February/March
Wat Phou – or Vat Phou – is found in the south of Laos, not too far from the border with Cambodia. The festival takes place over the full moon in February/March each year, just as the temperatures are getting a little hotter. Being down south, the heat is hotter than the northern areas of the country but is still bearable. The festival sees the UNESCO World Heritage ruins of a Khmer-Hindu temple complex host boat races, elephant processions, and unique religious ceremonies.
Laos National Day – 2 December
This public holiday commemorates the establishment of the Lao People’s Democratic Republic in 1975. The cities are perhaps the best place to enjoy this day, with parades and patriotic events taking place. While it is more formal than the religious festivals, you will see the national flag flying from every building and enjoy a quiet, celebratory atmosphere in the major cities. Taking place in early December, the temperatures should still be relatively cool in Vientiane, Pakse, and Luang Prabang.
Traveling Laos in every season: expert tips from In Asia Travel
While the rains make sure that Laos is at its most photogenic, they can also make travel a little trickier. The biggest challenge is the mud in rural areas, which can make smaller roads impassable. Boat travel is often better than road travel during this time, as river levels are high and the passing jungle is vibrant.
Pack a good-quality, lightweight rain poncho, dry bags for your electronics, and sturdy sandals with straps and a good grip. Flip-flops can prove treacherous in the heavy rain.
This is the peak travel period for a reason: the skies are clear and the temperatures are mild. However, the northern mornings can feel especially chilly, especially when trekking at altitude.
When it comes to packing, layers are the way to go. Bring a fleece or light down jacket for early mornings and evening Mekong cruises, plus long walking trousers to protect against both the cold and mosquitoes.
Expect intense heat during this period, particularly in the southern regions. Plan your activities so the more strenuous sightseeing takes place before midday, and the afternoons are spent in cooler environments, such as caves or swimming areas. The altitude of the Bolaven Plateau can offer some respite from the heat.
Pack plenty of breathable linen or moisture-wicking shirts and t-shirts, a wide-brimmed hat, and lightweight walking trousers. Bring plenty of decent sunscreen too, as it can be tricky and/or expensive to source locally.
Richard Reardon
Rich has lived and worked across Southeast Asia for over twenty years, primarily in Thailand but also in the Philippines, Cambodia, Indonesia, and Hong Kong. With a background that extends to Australia, New Zealand, and Palau, his career has centered on his work as a scuba diving instructor. When not in the water, he is an avid trekker with a particular love of the Nepalese Himalayas.
Gabriele Stoia
With 25 years dedicated to his passion for travel and Asian culture, Gabriele has developed a career as a tour guide and ethnographic photographer after relocating to Asia. Subsequently, he founded In Asia Travel, a tour operator specializing in personalized travel experiences throughout Southeast Asia and Central Asia, leveraging his extensive knowledge of the territory to create bespoke travel itineraries.
