Measurements:
°C
°F
CURRENT WEATHER
12:17
Hainan
86°F
W 6 mph
Feels like: 92°F
Precip: 8%
World Resorts China Hainan Weather

7 Day Weather Forecast

09.09
wed
DAY
86°F
W 6 mph
precip
8%
NIGHT
78°F
NW 3 mph
precip
17%
09.10
thu
DAY
80°F
W 9 mph
precip
34%
NIGHT
76°F
NW 1 mph
precip
46%
09.11
fri
DAY
74°F
SW 7 mph
precip
78%
NIGHT
76°F
NE 2 mph
precip
19%
09.12
sat
DAY
80°F
SW 9 mph
precip
38%
NIGHT
74°F
W 14 mph
precip
89%
09.13
sun
DAY
76°F
W 11 mph
precip
76%
NIGHT
76°F
NW 8 mph
precip
39%
09.14
mon
DAY
78°F
W 6 mph
precip
47%
NIGHT
78°F
N 4 mph
precip
29%
09.15
tue
DAY
84°F
SE 2 mph
precip
29%
NIGHT
78°F
NE 2 mph
precip
40%

Hainan Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Hainan was 29.1°F. The maximum and minimum values were 28.6°F and 29.8°F respectively.

Hainan on the Weather Map

Best Time to Visit Hainan
The most sunny months:
June 12 days
April 12 days
March 11 days
The most warm months:
June 94.5 °F
May 93.2 °F
July 93.0 °F
Warmest sea temperature:
July 90.7 °F
June 90.5 °F
August 90.3 °F
The most cold months:
December 71.7 °F
January 72.3 °F
February 77.5 °F
The most rainy months:
September 15 days
August 14 days
July 14 days
The most windy months:
April 4 mph
March 4 mph
October 4 mph
more details