26.08
wed
wed
Day
86°F
E 3 mph
Precip.
50%
50%
Night
77°F
NE 3 mph
Precip.
32%
32%
27.08
thu
thu
Day
86°F
E 4 mph
Precip.
16%
16%
Night
79°F
N 3 mph
Precip.
25%
25%
28.08
fri
fri
Day
88°F
E 7 mph
Precip.
12%
12%
Night
79°F
NE 4 mph
Precip.
28%
28%
29.08
sat
sat
Day
84°F
E 9 mph
Precip.
17%
17%
Night
79°F
NE 4 mph
Precip.
30%
30%
30.08
sun
sun
Day
75°F
NE 2 mph
Precip.
57%
57%
Night
77°F
E 4 mph
Precip.
39%
39%
31.08
mon
mon
Day
75°F
N 4 mph
Precip.
77%
77%
Night
77°F
N 4 mph
Precip.
35%
35%
01.09
tue
tue
Day
79°F
N 4 mph
Precip.
22%
22%
Night
77°F
N 4 mph
Precip.
30%
30%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 86.2°F. The highest and lowest sea temperatures during the month were 87.4°F and 84.4°F.
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: 04:42
August 26, wednesday
0600
75°F
NE
4 mph
4 mph
0900
77°F
NE
4 mph
4 mph
1200
86°F
E
3 mph
3 mph
1500
77°F
NE
4 mph
4 mph
1800
79°F
NE
2 mph
2 mph
2100
81°F
NE
3 mph
3 mph
August 27, thursday
0000
77°F
NE
3 mph
3 mph
0300
77°F
N
3 mph
3 mph
