Ha Long Bay weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Poor
Best time to visit: November – April
What is the weather like in Ha Long Bay in July?
In July, Ha Long Bay is hot: daytime highs average 31 °C, and even at night it stays warm at around 27 °C. The sea averages 29.7 °C – almost as warm as a bath. Expect around 5 hours of sunshine a day. It rains often – on about 25 days, adding up to 301 mm. On about 23 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is not an ideal month for a holiday in Ha Long Bay.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 13 h 18 min05:19 – 18:36
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 83 %on averageAll months
- Hot days
- 23 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Bangkok
How the score comes together
- Temperatureweight 50 %39 %
- Sunshineweight 20 %35 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Ha Long Bay in July: quick answers
Is Ha Long Bay hot in July?
Yes. In July, Ha Long Bay is hot: daytime highs average 31 °C and nights stay around 27 °C. On about 23 days the thermometer climbs to 30 °C or more.
Can you swim in Ha Long Bay in July?
Yes. In July the sea averages 29.7 °C – almost as warm as a bath.
Does it rain much in Ha Long Bay in July?
It rains often – on about 25 days, adding up to 301 mm.
Ha Long Bay month by month
The whole year in Ha Long BayAll destinations: VietnamWhere to go in JulySea temperature in July
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