Any recommendation. To answer the OP, nudity in public is illegal and could get you thrown in jail. You are not going to be bothered by the police or anyone. I am not aware of anyplace you can go bottomless, however there are some very small beaches on the island which you must pay an entrance fee to access. I have heard that if you buy up all the spots there that you can then do what you want as there will be not other people around because the property owner will"close" access, eseentially making is a private beach even though all beaches are owned by the Crown. Some years ago there was a report of a developer wanting to develop a nude resort on an island near the Burmese boarder, but I have never heard anything since. And going topless by westerners ignores local customs, culture and feelings, and basically shows total disrespect towards the country they are guests in. Its illegal and contrary to our culture.
The reason Thailand is included in Castaways' website is that we believe social nudity, small nudist resorts and nudist beaches will continue to evolve and are magnets for adult and clothing optional clients. Nudity is not yet widely accepted in Thailand, although topless sunbathing is fairly common in some popular tourist beach areas. Thailand is one of the absolute best vacation values you will find anywhere on earth, so try to visit can and stay at least 10 days if time permits. One reason it's the most popular tourism destination on earth. We've found the local citizens are wonderful.
Charged THB80 per hour for non-residential visitors or a nightly rate from THB1,, those who enter are expected to be nude, but a towel is permitted in case you are not yet comfortable baring it all. On a recent Thursday afternoon, there were a few Thai men lounging naked in a swimming pool while another one casually did some work on his laptop while sitting nude on a towel. On a busier day, however, there are crowd-pleasing activities to participate in that might include a barbeque, yoga or outdoor movie night, that people pay to do together while naked. I was handed a piece of paper that contained a list of their rules. This includes intimate touching that you would normally not do in a public place.
The beach is in the middle of the twentieth century. It is a time when it comes to ideas. This conceptual approach has been completely lost. The mass nudism gradually consigns to the past.