Haitangwan, also known as Haitang Bay, is one of the five major bays of Sanya, a city on the southern coast of Hainan Province, China. It lies on Hainan Island, the country's southernmost province, within the Sanya municipal area.
As one of Sanya's principal bays, Haitangwan is counted alongside the city's other major coastal inlets as a defining feature of its shoreline. The bay's setting on Hainan's southern coast places it within a tropical maritime environment.
Beyond its status as one of Sanya's five major bays, the available reference material does not provide further detail on the bay's specific characteristics, development, or attractions.