Ha Long Bay weather in January
Temperature, sea and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Good
Best time to visit: November – April
What is the weather like in Ha Long Bay in January?
In January, Ha Long Bay is mild: daytime highs average 20 °C, and nights cool down to about 15 °C. The sea averages 19.4 °C – bracing, so a wetsuit helps for longer swims. The sun is scarce, with only about 3 hours a day. Rain falls on about 7 days, adding up to 32 mm. All in all, January is a good month for a holiday in Ha Long Bay.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 79 | 74 | 77 |
| Day | 21° | 20° | 21° |
| Night | 16° | 15° | 16° |
| Sea | 22° | 19° | 19° |
| Sun | 4 h | 3 h | 3 h |
| Rain days | 6 | 7 | 6 |
More details for January
- Daylight
- 10 h 59 min06:31 – 17:30
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 4 daysdew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 72 %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 %0 %
- Few rainy daysweight 30 %81 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in January
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
Ha Long Bay in January: quick answers
Is Ha Long Bay hot in January?
No. In January, Ha Long Bay is mild: daytime highs average 20 °C and nights drop to about 15 °C.
Can you swim in Ha Long Bay in January?
Only if you don't mind cold water: in January the sea averages just 19.4 °C. Comfortable swimming is possible from March to December.
Does it rain much in Ha Long Bay in January?
Rain falls on about 7 days, adding up to 32 mm.
Ha Long Bay month by month
The whole year in Ha Long BayAll destinations: VietnamWhere to go in JanuarySea temperature in January
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