Current Sea Water Temperature:
+86.2°F
| Maximum Sea Water Temperature in April: | 90.8°F |
| Minimum Sea Water Temperature in April: | 70.4°F |
| Average water temperature in April: | 82.3°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| April 20 | 86.2°F | April 15 | 88.4°F |
| April 19 | 86.0°F | April 14 | 87.0°F |
| April 18 | 86.8°F | April 13 | 86.6°F |
| April 17 | 87.6°F | April 12 | 86.6°F |
| April 16 | 88.4°F | April 11 | 88.2°F |
When is the Warmest Sea for Hainan?
According to our data for the last three years for Hainan the highest average sea water temperature was in July, June and August.
Average Water Temperature by Month, °F
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Hainan was 90.2°F. The maximum and minimum values were 89.0°F and 91.8°F respectively.
Sea Water Temperature in June
The average sea surface temperature in June 2025 for Hainan was 90.2°F. The maximum and minimum values were 89.4°F and 91.2°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Hainan was 90.3°F. The maximum and minimum values were 88.2°F and 91.8°F respectively.
China Resorts:
NAME
F°
| Beidaihe |  |
+54 |
| Beijing | |
+62 |
| Dadunhai |  |
+78 |
| Dalian | |
+54 |
| Guangzhou |  |
+84 |
| Haikou | |
+80 |
| Hainan | |
+74 |
| Hong Kong | |
+80 |
| Macau |  |
+80 |
| Quingdao | |
+54 |
| Sanya | |
+78 |
| Shanghai | |
+56 |
| Shenzhen | |
+80 |
| Weihai | |
+48 |
| Yalong Bay | |
+78 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Hainan
Local time: 00:02
21 apr, tuesday
| 0300 |  |
72°F | N 4 mph |
| 0600 | |
74°F | N 4 mph |
| 0900 |  |
82°F | NW 5 mph |
| 1200 | |
96°F | N 8 mph |
| 1500 |  |
100°F | N 7 mph |
| 1800 | |
92°F | SW 0 mph |
| 2100 |  |
80°F | N 4 mph |
22 apr, wednesday
| 0000 | |
76°F | N 6 mph |