Haikou City, the capital of Hainan Province, is located on the southern bank of the Qiongzhou Strait, facing the mainland's Leizhou Peninsula. Built on the mound of the coast, it is the biggest city in Hainan Province. Haikou City has an annual mean temperature of 23.6 centigrade degree and an annual mean rainfall of 1,690 mm.

The city of Haikou is on the northern edge of the torrid zone, and is part of the monsoon tropical zone. April to October is the active period for tropical storms and typhoons; most occur between August and September. May to October is the rainy season with most rainfall coming in September.
With sea surrounding on three sides, Haikou is a city with excellent environment. It also enjoys the reputation of "a coconut city" or "a pearl on the treasure island" for its graceful coconut palms and fascinating sea scenery. Haikou is a city with a long history.