When to go to Thailand: climate, best time and months to avoid

Who I am
Martí Micolau

wikipedia.org, lonelyplanet.com

Author and references

The "Land of Smiles", as Thailand is called: kindness and broad smiles are a custom here! This is an area full of treasures and interesting things to discover, and it never ceases to attract the many tourists who decide to visit it every year.
But we know that when we think of traveling to such distant places, the first questions that immediately come to mind are: when to go? How should I dress? What climate will I find? Here we will try to shed some light on these topics with one complete guide, so that you can better organize your trip towards this fascinating destination.


  1. Best time
  2. Period to avoid
  3. Climate and seasons
  4. User questions and comments

Best time

If you want to take a good bath, the Thai sea is warm all year round, but a distinction must be made according to the areas to avoid being surprised by a downpour. The best times to visit it are:

  1. North Region (Chiang Mai) and South Region (Bangkok): from December to mid-February, outside the rainy season and with less heat. From May to October there are heavy rains and the sky is often cloudy, at the end of February the heat becomes intense.
  2. Peninsular Thailand - East Coast (Koh Samui, Pattaya): from mid or late January to April, especially February which is the least hot.
  3. Peninsular Thailand - West Coast (Phuket): from the end of December to March. While when it is summer with us, it rains a lot and the sea can be rough.

In general, the best month to visit Thailand is January, both at the climatic and economic level.
From November to April is the high season, where tourists are most concentrated and prices also go up. It is the dry season, where the climate is mild, and big attractions like the Grand Palace or the Damnoen Saduak floating market are taken by storm.

March to May is a good compromise, because there is the famous "Thai Water Festival" and in April the Thai New Year is celebrated. However, temperatures already reach 35 ° C, organize excursions in the coolest hours.

Period to avoid

Throughout Thailand the worst period is the rainy season, which runs from May to October (on the east coast from October to December).

From May to November there is a risk of tropical cyclones, most likely in August and October.
However, compared to countries in Southeast Asia (such as the Philippines), it does not suffer much damage. The last cyclone that hit the most was Gay, which hit the Gulf of Thailand in November 89.

Climate and seasons

Thailand has a very pleasant climate, which can be defined as tropical monsoon: humid and hot, with high peaks between March and May, but attenuated by the monsoons in some months. The monsoon coming from the southwest, from mid-May to October, brings rain (often in the afternoon), while the monsoon coming from the north-east, from November to February, brings a dry and relatively cool climate, especially in the north.

Winter temperatures usually drop to 15 ° C especially in the north of Thailand, while the highest peaks reach 40 ° C in April in the central and southern parts. In the capital Bangkok, temperatures are always high: in April, peaks of 35 ° C are reached and in December, which for us is the winter month par excellence, there are around 31 ° C.
Let's see in detail the temperatures and rainfall that characterize the various areas of Thailand.

Average Temperatures and Precipitation - North Region (Chiang Mai)

In the northern plain, the climate is warm all year round, except in winter when it drops to around 12-13 ° C in the Chiang Mai area.
From February the temperatures undergo a marked increase, up to 35 ° C.
The monsoon period, which runs from May to October, brings heavy rains (the greatest peaks in August and September) and the sky is often cloudy.

Recommended period: Let's say that the favorable climate in the northern area is from December to January.

Average Temperatures and Precipitation - South Region (Bangkok)

In the southern region and in Bangkok, the climate is often good and even in winter it is hot.
Between March and mid-May it reaches 37-38 ° C and the proximity of the sea makes the air even more humid which in the city, among the buildings, becomes unbreathable.
From mid-May, the monsoon brings a drop in temperatures and the rains cool a bit.

Recommended period: from December to mid-February, characterized by the absence of rain and a mildly sultry heat.

Average Temperatures and Precipitation - Peninsular Thailand / East Coast (Koh Samui, Pattaya)

In peninsular Thailand, the climate is warm and the rainy season occurs at different times.
On the east coast, the summer monsoon is not particularly intense, while the monsoon that runs from October to December brings torrential rains.

Recommended period: in this area, which includes Koh Samui, the most favorable period is from late January to early April.

Average Temperatures and Precipitation - Peninsular Thailand / West Coast (Phi Phi Island, Phuket)

The west coast, on the other hand, which includes the popular Phi Phi islands and Phuket, rains little from December to March and, therefore, this is certainly the best time to relax in these beautiful places.

Recommended period: from the end of December to March.

What to bring in your suitcase

In general, avoid heavy clothing that would not be worn: better bring a jacket and cover up when needed. Always wear comfortable shoes and pack insect repellent, sunscreen, scarves and gods long pants, essential for accessing temples where it is necessary to cover the ankles (as well as the feet).


  • Capital: Bangkok
  • Population: 68,86 million
  • Area: 513.120 sq. Km
  • Languages: Thai and English (the latter only in the capital and in the main tourist areas)
  • Currency: Baht (THB) / Exchange rate: € 1,00 = 38,51 baht - 100 baht = € 2,60
  • Documents: original passport with residual validity of at least 6 months upon arrival and at least two free pages remaining for affixing the visa
  • Time zone: +6 h compared to Italy
  • vaccinations: no vaccination is required for Italian travelers, but it is a good idea to visit your doctor a few weeks before departure: he will be able to advise you in the best possible way!

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