What's the weather like in Sanya in the middle of September?

September is the rainy season in Sanya, and the relative annual average temperature is about 27-33℃. Before going out, you just need to see if there are any tropical storms, cyclones or typhoons in the last week. Usually it's really hard to predict when it rains. Sometimes it rains at night, and sometimes it rains during the day. As long as it's sunny during the day, it won't be cold in the sea, but it's a little cold just after entering the water, and the whole person will be fine when going down. ....