Ha Long Bay weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Good
Best time to visit: November – April
What is the weather like in Ha Long Bay in October?
In October, Ha Long Bay is hot: daytime highs average 28 °C, and even at night it stays warm at around 23 °C. The sea averages 27.9 °C – lovely and warm for swimming. Expect around 5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 116 mm in total. On about 6 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Ha Long Bay.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 36 | 61 | 76 |
| Day | 30° | 28° | 25° |
| Night | 25° | 23° | 20° |
| Sea | 29° | 28° | 25° |
| Sun | 5 h | 5 h | 5 h |
| Rain days | 21 | 13 | 9 |
More details for October
- Daylight
- 11 h 42 min05:46 – 17:28
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 25 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 54 %on averageAll months
- Hot days
- 6 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Bangkok
How the score comes together
- Temperatureweight 50 %83 %
- Sunshineweight 20 %40 %
- Few rainy daysweight 30 %39 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Ha Long Bay in October: quick answers
Is Ha Long Bay hot in October?
Yes. In October, Ha Long Bay is hot: daytime highs average 28 °C and nights stay around 23 °C. On about 6 days the thermometer climbs to 30 °C or more.
Can you swim in Ha Long Bay in October?
Yes. In October the sea averages 27.9 °C – lovely and warm for swimming.
Does it rain much in Ha Long Bay in October?
Rain is frequent, with about 13 rainy days and 116 mm in total.
Ha Long Bay month by month
The whole year in Ha Long BayAll destinations: VietnamWhere to go in OctoberSea temperature in October
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