Average sea water temperature in September:
+84.2°F
| Minimum sea water temperature in September: | 87.6°F |
| Maximum sea water temperature in September: | 80.8°F |
Daily sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 83.5°F. The highest and lowest sea temperatures during the month were 85.8°F and 82.2°F.
Monthly sea water temperature in Haikou, °F
Which China resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Zhuhai | 84.7°F | 85.3°F |
| Shenzhen | 84.6°F | 85.0°F |
| Macau | 84.5°F | 85.0°F |
| Beihai | 84.4°F | 86.0°F |
| Guangzhou | 84.1°F | 84.8°F |
| Tainan | 84.0°F | 85.4°F |
| Hong Kong | 84.0°F | 84.5°F |
| Haikou | 83.5°F | 84.3°F |
| Xiamen | 83.2°F | 85.0°F |
| Hainan | 83.0°F | 84.5°F |
| Yalong Bay | 82.4°F | 84.2°F |
| Sanya | 82.3°F | 84.1°F |
| Dadunhai | 82.3°F | 84.1°F |
| Taichung | 81.7°F | 85.9°F |
| Shanghai | 81.7°F | 85.4°F |
| Ningbo | 81.2°F | 83.8°F |
| Taipei | 81.1°F | 85.1°F |
| Nantong | 80.9°F | 85.1°F |
| Suzhou | 80.8°F | 85.2°F |
| Hangzhou | 80.5°F | 84.0°F |
Best time for vacation in Haikou
Haikou on a weather map
Places in China:
Name
°F
24 Hours Forecast
Haikou
Local time: 07:49
October 06, tuesday
0900
75°F
S
7 mph
7 mph
1200
81°F
SW
12 mph
12 mph
1500
79°F
SW
11 mph
11 mph
1800
79°F
SW
12 mph
12 mph
2100
79°F
SW
11 mph
11 mph
October 07, wednesday
0000
79°F
SW
11 mph
11 mph
0300
77°F
SW
11 mph
11 mph
0600
79°F
SW
13 mph
13 mph
