Average daily air temperature in October in Hainan + 28 ... + 30 ° C, water + 25 ... + 27 ° C.

In the southern part of Hainan Island around the resort of Sanya and its three bays (Sanya, Yalunvan and Dadonghai) is the majority of hotels and the main recreation areas of the island, for which the area is often called "Eastern Hawaii" (plus the resort is located on the same latitude as the Hawaiian Islands ). The average annual air temperature is + 24 ° C, water - + 26 ° C. Golden season in Hainan - from November to May, and really the best time - October - November and February - March. The region is traditionally considered to be a "typhoon corridor", so the island is a haven for windsurfers.

In October here in the day, about +27 ... + 30 ° C, at night around + 22 ° C, the water in the bay is heated to +28 ° C . Precipitations are about 200 mm