Ha Long Bay weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Good
Best time to visit: November – April
What is the weather like in Ha Long Bay in December?
In December, Ha Long Bay is warm: daytime highs average 21 °C, and nights cool down to about 16 °C. The sea averages 22.0 °C – refreshing for a swim. The sun is scarce, with only about 4 hours a day. Rain falls on about 6 days, adding up to 28 mm. All in all, December is a good month for a holiday in Ha Long Bay.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 76 | 79 | 74 |
| Day | 25° | 21° | 20° |
| Night | 20° | 16° | 15° |
| Sea | 25° | 22° | 19° |
| Sun | 5 h | 4 h | 3 h |
| Rain days | 9 | 6 | 7 |
More details for December
- Daylight
- 10 h 52 min06:21 – 17:13
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 5 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 61 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Bangkok
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %12 %
- Few rainy daysweight 30 %88 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in December
- Swimwear
- Sunscreen
- A jumper for the evenings
Ha Long Bay in December: quick answers
Is Ha Long Bay hot in December?
Warm rather than hot: in December, daytime highs in Ha Long Bay average 21 °C and nights cool to about 16 °C.
Can you swim in Ha Long Bay in December?
Yes. In December the sea averages 22.0 °C – refreshing for a swim.
Does it rain much in Ha Long Bay in December?
Rain falls on about 6 days, adding up to 28 mm.
Ha Long Bay month by month
The whole year in Ha Long BayAll destinations: VietnamWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences