Although Hainan has good seasons and wears short sleeves, it is still hot and cold. 15 degrees can't go swimming, can you?

If you want to swim, I suggest you go in May and June. At that time, the temperature was around 27-30 degrees, so you can go to the seaside, and it won't be very cold. If it is a holiday,10-65438+February. It was about 25 degrees, but it might be cold in the sea.

Of course, the temperatures I mentioned above are all in Sanya, and the temperatures in other parts of Hainan are several degrees lower than those in Sanya.