Current Sea Water Temperature:
+89.8°F
| Maximum Sea Water Temperature in July: | 94.2°F |
| Minimum Sea Water Temperature in July: | 85.8°F |
| Average water temperature in July: | 90.7°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| July 10 | 89.8°F | July 05 | 90.0°F |
| July 09 | 89.4°F | July 04 | 91.0°F |
| July 08 | 89.4°F | July 03 | 91.6°F |
| July 07 | 90.2°F | July 02 | 92.4°F |
| July 06 | 90.6°F | July 01 | 91.8°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 2026 for Hainan was 92.0°F. The maximum and minimum values were 90.0°F and 94.2°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 |  |
+80 |
| Beijing |  |
+80 |
| Dadunhai | |
+84 |
| Dalian |  |
+78 |
| Guangzhou |  |
+92 |
| Hainan | |
+78 |
| Hong Kong | |
+86 |
| Macau | |
+86 |
| Quingdao | |
+80 |
| Sanya | |
+84 |
| Shanghai | |
+84 |
| Shenzhen | |
+86 |
| Weihai | |
+78 |
| Yalong Bay | |
+84 |
| Yantai | |
+80 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Hainan
Local time: 20:35
10 jul, friday
| 2100 |  |
78°F | N 3 mph |
11 jul, saturday
| 0000 | |
76°F | NE 4 mph |
| 0300 | |
76°F | N 4 mph |
| 0600 |  |
76°F | NE 3 mph |
| 0900 |  |
84°F | N 4 mph |
| 1200 |  |
90°F | E 3 mph |
| 1500 | |
88°F | E 3 mph |
| 1800 | |
86°F | NE 2 mph |