Naturism in Thailand started in fact in 1931, 85 years ago. Of course many Thai that lived in the country side and forests at that time were practicing naturism and didn’t know it. Khun Salin Foothai came back from a trip to Europe and started Thailand’s first naturism organization; unfortunately it was not as successful as what we have today.
Today naturism in Thailand stretches from Chiang Mai to Phuket, thanks to the efforts of Naturist Association Thailand and those associated with it. Of course many think naturism is not growing as fast as it should and I tend to agree, only because I live a naturist life and it is completely normal to me. But in actuality we are growing by leaps and bounds. We are growing at a faster rate than naturism grew in the United States, where naturistsm was first introduced in 1932 – one year after Thailand. Here in Thailand just 8 short years we have naturist resorts from one end of the country to the other. We are in major cities of Bangkok, Pattaya, Phuket, Chiang Mai and some in between. Others are in the planning stages.
Other than the culture, the thing that makes naturism in Thailand so natural is the weather. Try to imagine that every day it is sunny or there is some sun and the temperature is about 30 º Celsius/ 80º Fahrenheit, what is the need for clothes?
Thailand's tropical climate is characterized by high temperatures and humidity throughout the year. April and May feature the hottest temperatures while the weather in June sees the monsoon pattern bringing heavy rain through to October.
November to February is the best time to visit Thailand as the weather is relatively mild and sunny with humidity levels dropping and temperatures cooling from the North East breeze. Thailand's average climate ranges from 30°C at its lowest in December and up to 36°C from January to April. Rainfall generally averages from 5mm in December to 300mm in September in central parts of Thailand.
Light cotton clothing that is not too revealing is recommended year round when visiting Thailand. There are also plenty of retailers who can recommend and provide suitable clothing at an affordable price. http://www.travelonline.com/thailand/weather.html
Most of us naturists here in Thailand who can live nude everyday of the year, do so. Many of us men (foreign and Thai) wear just the Pakaoma (Thai men’s sarong) if we go to the door or out to the yard where we could be seen by non-naturist people.
Some people assume that Thai people are offended by seeing nude people. Actually from my experience and research not many are. For sure there would be those Muslims in the south and living on raft communities in the sea, but by and large not. As long as you are behaving yourself, sunning, playing in the surf, hiking, and such, it is almost normal. It is when you are doing sexual things and throwing your nudity in their face that they become offended and find it rude. Many Thai persons swam nude in the canals and rivers while growing up, so they understand that part of naturism.
Those Thai or foreigners that don’t understand that naturism has nothing to do with sex are learning the finer points of naturism or we remove them from the membership. We are strict about the separation of sex and naturism. Try to imagine a village that lives their life nude, there are some still in existence in jungle tribes of the Amazon. In this village there are men, women, and children of all ages. There are young men and women, middle aged mothers and fathers, teenagers, and grandparents. Now what would happen to this society if tribal members were having intercourse with anyone at the drop of a hat? Its inhabitants and their society would soon revolve to chaos and less than basic animal instincts.
The majority of Thai that live outside of Bangkok are not as sexually influenced or motivated by the media as people in western countries, so they catch on very quick and understand that naturism is a natural thing.
More about naturism in Thailand in 1931: https://thailandnaturist.com/newsroom/naturists-in-1931-in-thailand/