I have been in Hainan for three years. Hainan is still very hot at the end of August and the beginning of September, which is not much different from July in the mainland. Most of the weather in Hainan is high temperature for several days, followed by heavy rain, which is quite regular. It's cool after the rain, but it's also hot and humid. If you want to travel to Hainan, I suggest11+65438+early February. At that time, Hainan will be very warm and the temperature will not change much every day, about 25 degrees.

I hope my answer is helpful to you.