In winter, the temperature is not high, and the highest temperature is more than 20 degrees, so it is basically impossible to go to sea. The temperature in Sanya is slightly higher than that in Beihai.

Beihai is a prefecture-level city under the jurisdiction of Guangxi Zhuang Autonomous Region. It is located at the southern tip of Guangxi and the northeast bank of Beibu Gulf, with east longitude10850' 45 "~10947' 28" and north latitude 20 26' ~ 2155' 34 ",bordering Guangdong Province in the east and Guangdong Province in the south. It belongs to subtropical maritime monsoon climate.

Beihai is one of the coastal open cities in China 14. It is also one of the most beautiful coastal cities in China; It is an important starting port of the ancient Maritime Silk Road and a national historical and cultural city.

Famous scenic spots include: Beihai Yintan, Weizhou Island, Beihai Old Street, Xingdao Lake and Yamaguchi Mangrove Nature Reserve. Since 2005, Beihai has been selected as "Top Ten Livable Cities in China". Beihai City faces rich marine resources in Beibu Gulf, which is one of the "four major fishing grounds" in China.