14.09
mon
mon
Day
77°F
NW 10 mph
Precip.
24%
24%
Night
72°F
N 2 mph
Precip.
39%
39%
15.09
tue
tue
Day
73°F
N 3 mph
Precip.
63%
63%
Night
75°F
N 2 mph
Precip.
29%
29%
16.09
wed
wed
Day
79°F
W 4 mph
Precip.
60%
60%
Night
73°F
N 2 mph
Precip.
39%
39%
17.09
thu
thu
Day
82°F
W 5 mph
Precip.
44%
44%
Night
73°F
NW 3 mph
Precip.
25%
25%
18.09
fri
fri
Day
77°F
W 7 mph
Precip.
66%
66%
Night
73°F
NW 3 mph
Precip.
42%
42%
19.09
sat
sat
Day
81°F
W 7 mph
Precip.
43%
43%
Night
75°F
NW 3 mph
Precip.
20%
20%
20.09
sun
sun
Day
81°F
W 6 mph
Precip.
42%
42%
Night
75°F
NW 3 mph
Precip.
33%
33%
21.09
mon
mon
Day
82°F
W 5 mph
Precip.
6%
6%
Night
75°F
NW 3 mph
Precip.
20%
20%
22.09
tue
tue
Day
82°F
W 5 mph
Precip.
22%
22%
Night
75°F
NW 3 mph
Precip.
22%
22%
23.09
wed
wed
Day
82°F
W 7 mph
Precip.
11%
11%
Night
73°F
NW 3 mph
Precip.
42%
42%
24.09
thu
thu
Day
81°F
W 6 mph
Precip.
8%
8%
Night
73°F
NW 3 mph
Precip.
21%
21%
25.09
fri
fri
Day
81°F
W 6 mph
Precip.
3%
3%
Night
73°F
NW 3 mph
Precip.
15%
15%
26.09
sat
sat
Day
81°F
W 6 mph
Precip.
36%
36%
Night
75°F
N 3 mph
Precip.
28%
28%
27.09
sun
sun
Day
82°F
W 3 mph
Precip.
17%
17%
Night
77°F
N 3 mph
Precip.
28%
28%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 84.5°F. The highest and lowest sea temperatures during the month were 85.6°F and 83.5°F.
Air temperature in Hainan, °F
Precipitation total in Hainan, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Hainan
Hainan on a weather map
Places in China:
Name
°F
24 Hours Forecast
Hainan
Local time: 22:28
September 15, tuesday
0000
72°F
N
2 mph
2 mph
0300
72°F
N
2 mph
2 mph
0600
72°F
NW
2 mph
2 mph
0900
72°F
NW
3 mph
3 mph
1200
73°F
N
3 mph
3 mph
1500
73°F
NW
3 mph
3 mph
1800
75°F
W
2 mph
2 mph
2100
75°F
NW
2 mph
2 mph
