17.05
sun
sun
Day
84°F
NW 12 mph
Precip.
100%
100%
Night
77°F
NW 11 mph
Precip.
73%
73%
18.05
mon
mon
Day
86°F
NW 11 mph
Precip.
100%
100%
Night
79°F
NW 11 mph
Precip.
0%
0%
19.05
tue
tue
Day
88°F
NW 9 mph
Precip.
100%
100%
Night
77°F
NW 9 mph
Precip.
100%
100%
20.05
wed
wed
Day
81°F
N 14 mph
Precip.
100%
100%
Night
81°F
NW 12 mph
Precip.
0%
0%
21.05
thu
thu
Day
81°F
N 13 mph
Precip.
0%
0%
Night
81°F
NW 14 mph
Precip.
0%
0%
22.05
fri
fri
Day
88°F
NE 7 mph
Precip.
100%
100%
Night
81°F
N 9 mph
Precip.
0%
0%
23.05
sat
sat
Day
90°F
NE 4 mph
Precip.
0%
0%
Night
81°F
N 6 mph
Precip.
0%
0%
24.05
sun
sun
Day
91°F
NE 6 mph
Precip.
0%
0%
Night
82°F
N 9 mph
Precip.
0%
0%
25.05
mon
mon
Day
93°F
N 7 mph
Precip.
0%
0%
Night
82°F
N 11 mph
Precip.
0%
0%
26.05
tue
tue
Day
93°F
NE 6 mph
Precip.
0%
0%
Night
82°F
NW 9 mph
Precip.
0%
0%
27.05
wed
wed
Day
95°F
E 4 mph
Precip.
0%
0%
Night
84°F
N 2 mph
Precip.
0%
0%
28.05
thu
thu
Day
88°F
E 9 mph
Precip.
100%
100%
Night
82°F
W 7 mph
Precip.
23%
23%
29.05
fri
fri
Day
88°F
N 5 mph
Precip.
0%
0%
Night
79°F
W 9 mph
Precip.
100%
100%
30.05
sat
sat
Day
84°F
W 9 mph
Precip.
100%
100%
Night
81°F
W 9 mph
Precip.
21%
21%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 79.7°F. The highest and lowest sea temperatures during the month were 83.5°F and 77.5°F.
Air temperature in Haikou, °F
Precipitation total in Haikou, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Haikou
Haikou on a weather map
Places in China:
Name
°F
24 Hours Forecast
Haikou
Local time: 07:03
May 17, sunday
0900
81°F
NW
14 mph
14 mph
1200
84°F
NW
12 mph
12 mph
1500
84°F
NW
12 mph
12 mph
1800
81°F
NW
14 mph
14 mph
2100
77°F
NW
15 mph
15 mph
May 18, monday
0000
77°F
NW
11 mph
11 mph
0300
77°F
NW
10 mph
10 mph
0600
77°F
NW
11 mph
11 mph
