I would like to recommend you to live in the city center like HNA Hotel Mingguang Haikou or Hainan Xinyuan Hot Spring Hotel, Haikou. You may also choose another from Haikou Hotels on your own. The average temperature is 19C in Feb. in Haikou, cool and pleasant with little rain.

if you really want to come here at that time. i hope u would better book the hotle in advanced. all the hotles will be expensive at that time, it is the chinese spring festval, many tourists will be there to have a vacation