Hạ Long Water Temperature
(Today) 2025
The water will feel unpleasantly warm (stifling). May be a little too warm for any kind of activity, particularly if sunny.
Current weather
(moderate rain)
The measurements for the water temperature in Hạ Long, Quảng Ninh are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.
*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.
Water temp by month
Monthly average max / min water temperatures
The graph below shows the range of monthly Hạ Long water temperature derived from many years of historical sea surface temperature data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 18.3 | 18 | 18.1 | 19.1 | 24.3 | 27.8 | 29.1 | 29.2 | 27.3 | 25 | 23.3 | 19.1 |
| Max °C | 20.9 | 21.5 | 22.3 | 26 | 30.4 | 30.9 | 31.9 | 31.1 | 31.2 | 29.3 | 26.5 | 24.4 |
| Min °F | 66 | 65.8 | 66.3 | 69.1 | 78.1 | 83.2 | 85.5 | 85.3 | 82.7 | 78.7 | 75.2 | 68.5 |
| Max °F | 68.6 | 69.3 | 70.5 | 76 | 84.2 | 86.3 | 88.3 | 87.2 | 86.6 | 83 | 78.4 | 73.8 |
The warmest water temperature is in July with an average around 86.9°F / 30.5°C. The coldest month is January with an average water temperature of 67.3°F / 19.6°C.
7 day tide forecast for Hạ Long
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*These tide times are estimates based on the nearest accurate location (Hongay, Vietnam) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.
