There is good and bad during the summer months in Thailand. The temperatures are hotter than hell, and the boys are not as abundant, but for the tourist, everything is cheaper, and less crowded. So, if you want to enjoy Thailand on a budget, this is definitely the time to do it.
Considering the only reason someone would want to visit Thailand at this time of the year is to save money, Pattaya is the only place I’d go. Of course, that’s also assuming you want to enjoy the boys. There are nicer beaches in Thailand, but for the cheapest stay, and largest selection of boys, there is only one choice.
While a lot of boys do return home during this time, you will still find a better selection in Pattaya. Although some might argue in favor of Chiang Mai, I believe your chances of finding the really good boys are also much better in Pattaya than any other location.
One of the things I hate about the gay beach in Pattaya (Jomtien) is all the vendors pestering you to buy their service or product. You can never get a moment’s peace, because there’s a continuous stream of them all day long. Then one day I discovered the area at the far end of the gay beach has substantially fewer, and much less aggressive, vendors. The only downside is little or no boys hang out there either.
Whatever your destination, you need to protect yourself from the heat. I’m not going to go into all those things you need to know about beating the heat. You can easily read about them at most tourism sites. A lot of it is common sense anyway. However, I will offer these three pieces of advice:
Walk slowly. Don’t be in a rush. It’s the quickest way to get yourself heated up.
Make good use of baby powder, particularly in those sweaty areas. All the Thai boys know about this. It really helps to avoid fungus infections by keeping you dry.
Let the boys do all the work, like carry your bags or run to the store for something.