Thailand Air Pollution

Three months a year Thailand has intensely bad air quality.

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Air Pollution in Thailand – What months are to be avoided?

I pretty much love Thailand and the Thai people. Every day is a relaxed day at the beach with plenty of very inexpensive and good food to eat. I arrived in Thailand in March of 2024. Everything was perfect. The year was wonderful.

It was my first Christmas spent not in America and it was pretty great.

Then the first week of January 2025 came around and everything changed. The air changed. I woke up one day and the sky was an ugly grey instead of a beautiful blue. School in Bangkok closed for days on end due to sudden pollution. People started wearing masks.

The second day of ugly grey skies in Pattaya and I woke up not feeling well. It was the first time I did not feel perfect in a year. I guessed it was tied to the pollution. To resolve this. I got a taxi and went to a store and purchased the best air purifier I could. I did not go out of my room except to get food and I ran the air purifier 24 hours a day. A couple days later I felt fine.

Below is a snap shot of air quality in Bangkok Thailand and Atlanta Georgia, USA. This comparison is not entirely fair as in Bangkok it is day time so more people are driving and in Atlanta it is night and so there are fewer people driving. However, it is still helps you understand what pollution in Thailand can be like, especially as Atlanta is not exactly known for having the best air condition.

How bad is the air really?

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Every Thai person knows someone who has died of an air pollution related illness.

Air pollution is not something I ever really gave much thought to until spending time here in Thailand. To see such a wonderful place transform into such an ugly place for a couple month each year is depressing. Air pollution in the 150 or higher range can cause severe health problems, including respiratory and cardiovascular diseases and cancer.

What causes air pollution in Thailand?

Vehicle emissions | Farmers burning their fields | Wind patterns change - The combination is deadly.

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In 2024, Thailand had over 1 million respiratory cases directly linked to air pollution.

I do not want to paint some horrible picture of Thailand. I love it here. Life is great and everyone should come spend some time. However, for two months a year it is just an unhealth place and should be avoided. Then around March, the air clears out and everything is good.

It is one thing for me to discuss air pollution in Thailand and another to see it in pictures. Below are 5 images. The top 3 are taken in May, July and then September 2024. The bottom 2 were taken in January and February 2025. See if you can tell the difference in quality of the air.

Thailand is well worth your time. Just not for the January, Febraury and March.

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Bringing kids of any age to Thailand in January and February is just hugely irresponsible, in my opinion. The air during those month are incredibly unhealthy.

Today I walked a block to my favorite street vendor of food. He was cooking over an open fire. Temperature was 92 F, there was no wind and air quality index (AQI) was 120. Of the 5 of us waiting for food, 3 of us had the occasional cough.

Come to Thailand and enjoy the great food, beaches and people when the air is good.

It always amazes me to see how busy January, February and March are. Millions of people fly in and spend several months. They bring there kids. Everywhere you look are families with small kids to include infants in strollers. Everywhere they go the air quality is really horribly bad but everyone seems to ignore it. I particularly see many Russian families here with small kids.

Let me try and paint this picture a different way. Every now and then the air pollution is so bad in Bangkok that it will affect the airport operations. As an example in January 2025 visibility was so bad at the Bangkok international airport due to air pollution that it affected flight operations in a negative way.

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