Weather in Halong bay: Climate, Seasons, and Average Monthly Temperature.

Halong Bay Weather

  • Wet season: May to September.
  • Dry season: November to March.
  • Best times to visit: January to April, October to December.
  • Halong is one of the most humid cities in Vietnam with the average annual humidity at 84%, which fluctuate from a minimum of 68% to a maximum of 90% in a year.

Weather Overview

Halong Bay has a tropical hot climate, with two very different weather patterns: hot and wet in the summer months, and dry and cool in the winter. Temperatures typically vary from around 10°C - 38°C so it is relatively temperate all year round.

Spring & Fall

Deciding on the best time to visit will depend on your personal preferences. As many people prefer the cool, dry weather of Spring and Fall, the peak visiting times tend to be from March to April and September to October. During these months, you can expect more sunny days, a cooler breeze and calmer weather. A minor shower is to be expected occasionally, but they rarely last long enough to disrupt visitors' plans.


Summer lasts from around May to September, and in this time, the air is hot and humid. This warmer weather helps create beautiful sunsets, viewable at times when there is no rain or fog. While the promise of summer heat can be tempting, the months of July to September are also the wettest, so visitors should check weather forecasts for signs of severe weather. Temperature high for these months is 38°C.


Winter lasts from around November to March. These months are the coldest with temperatures dropping down to 10°C - 20°C on average with a low of 16°C. This is also the dry season, not a lot of rainfall is to be expected.

Halong bay on a sunny summer day. 

Thanks to the nature of a closed-sea area, Halong is lucky not to be much affected by heavy storms. The strongest storms on the bay normally are at level 9 and 10, hardly anytime reaching level 11.

14-Day Weather Forecast

Mon 26 Oct
26°C 25°C Overcast skies
16 m/h
clouds: 92%, 1014 hpa
Tue 27 Oct
28°C 27°C Sunny skies
3 m/h
clouds: 21%, 1013 hpa
Wed 28 Oct
28°C 27°C Partly cloudy skies
18 m/h
clouds: 47%, 1012 hpa
Thu 29 Oct
27°C 25°C Cloudy skies
27 m/h
clouds: 66%, 1015 hpa
Fri 30 Oct
26°C 25°C Cloudy skies
13 m/h
clouds: 83%, 1018 hpa
Sat 31 Oct
26°C 24°C Overcast skies
15 m/h
clouds: 100%, 1017 hpa
Sun 01 Nov
27°C 25°C Light rain shower
12 m/h
clouds: 93%, 1018 hpa
Sun 01 Nov
27°C 25°C Light rain shower
12 m/h
clouds: 93%, 1018 hpa
Mon 02 Nov
27°C 25°C Clear skies
6 m/h
clouds: 0%, 1015 hpa
Tue 03 Nov
28°C 25°C Cloudy skies
6 m/h
clouds: 64%, 1018 hpa
Wed 04 Nov
21°C 21°C Cloudy skies
14 m/h
clouds: 76%, 1018 hpa
Thu 05 Nov
19°C 19°C Light drizzle
9 m/h
clouds: 100%, 1017 hpa
Fri 06 Nov
19°C 19°C Light drizzle
5 m/h
clouds: 100%, 1016 hpa
Sat 07 Nov
24°C 22°C Clear skies
6 m/h
clouds: 13%, 1014 hpa
Sun 08 Nov
25°C 23°C Clear skies
6 m/h
clouds: 10%, 1010 hpa
Mon 09 Nov
26°C 24°C Partly cloudy skies
12 m/h
clouds: 29%, 1010 hpa
Tue 10 Nov
21°C 21°C Partly cloudy skies
7 m/h
clouds: 60%, 1010 hpa

Monthly Weather Averages

High / Low (°C)
20° / 14°
4 days
21° / 15°
4 days
23° / 18°
7 days
27° / 21°
6 days
30° / 24°
8 days
32° / 26°
9 days
32° / 26°
11 days
32° / 25°
12 days
31° / 24°
10 days
29° / 22°
4 days
26° / 19°
3 days
22° / 15°
3 days

Weather By Month

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