How is it advisable to travel to Haikou in mid Sep. 2016?

Well, I'm afraid that the mid september is not a good ideas. The previous records show that there may have frequent heavy rainy days during that period of time. It may influence the sightseeing a lot.

So you are suggested to change the travel plan. October to May is recommended. It will be warm and have enough sunshine. And you can fully enjoy the fun of swimming. Only summer clothes are enough to prepare. Remember to bring sun cream, topee and sunglasses. Have fun!