Hainan Weather

Hainan is located in tropical monsoon zone. A generally high temperature all the year round is the biggest characteristic of Hainan weather. The four seasons are not distinct: summer is long and hot, while other seasons are warm. The rainfall is abundant, with a yearly average precipitation of 1,600ml. The rainy season is usually from May to October, when the rainfall takes 80% of the whole year. August and September see the most rainfalls, many of which are heavy but short downpours. Typhoons come here usually from May to June and September to November.

November to next April is the most ideal time when the weather is not too hot. Even in winter, it is warm but not cold, thus attracting many people to escape the winter coldness of the Northern Hemisphere. However, you’d better avoid going there around Chinese New Year in late January to middle February, when the travel cost rises rapidly because many Chinese flow in there to spend their holiday.

Annual Weather Facts of Major Cities

Haikou Weather Averages
  • High Temp: 32~34℃ (90~93℉)
  • Low Temp: 15~17℃ (59~63℉)
  • Humidity: 84%
  • Rainfall: 1,649mm
3-Day Haikou Weather Forecast
Sanya Weather Averages
  • High Temp: 31~33℃ (89~91℉)
  • Low Temp: 19~21℃ (66~70℉)
  • Humidity: 79%
  • Rainfall: 1,393 mm
3-Day Sanya Weather Forecast


Hainan Climate & Seasons

Hainan climate is warm and hot in all seasons. The temperature is generally high and does not vary much throughout the year. It doesn’t have a clear division of the four seasons. When traveling to Hainan, all scenic areas can be visited at all times, except when it rains or typhoon hits.

Spring (Mar - Apr)

With the temperature at 20~30℃ (68~86℉) and less rainfall, it is relatvely a good season to visit Hainan.

What to Wear: thin T-shirt, blouse, shorts, dress, leisure shoes…

Summer (May - Sep)

Summer in Hainan is long with five months. It is not recommended to go in summer, especially during July to September, because the weather is hot and the ultraviolet radiation is too strong, might making you get sunstroke or sunburn. Also, it rains more often.

What to Wear: quick-dry T-shirt, skirt, shorts, sandals…

Autumn (Oct - Nov)

The climate in autumn is similar to that in spring.

What to Wear: short sleeves, shirt & blouse, sweatpants…

Winter (Dec - Jan)

In winter, the coldest time in a year, the climate is still warm with temperature at 15~21℃ (59~70℉). Therefore, Hainan in winter attracts most travelers from worldwide, which also leads to higher travel cost.

What to Wear: T-shirt, light pants, light overcoat, casual shoes…

Travel Advice

1.    No matter whenever you travel to Hainan, well protect yourself from sunburnt. A pair of sunglasses and sun hat are always necessary. Also, a pair of slippery will be very convenient to visit the beaches.
2.    Besides visiting the scenic areas like Tianya Haijiao, Wuzhizhou Island, and Yalong Bay, don’t forget to try the local various sea foods and tropical fruits. However, go to the reliable restaurants in case of being robbed.  

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- Last updated on Jun. 18, 2023 -
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