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 14°C - 32°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 32 °C.


Winter lasts from around December to March. These months are the coldest with temperatures dropping down to 12 °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

Thu 20 Feb
20°C 16°C Overcast skies
13 m/h
clouds: 100%, 1022 hpa
Fri 21 Feb
21°C 17°C Cloudy skies
15 m/h
clouds: 65%, 1025 hpa
Sat 22 Feb
23°C 21°C Sunny skies
9 m/h
clouds: 3%, 1025 hpa
Sun 23 Feb
22°C 20°C Sunny skies
12 m/h
clouds: 5%, 1022 hpa
Mon 24 Feb
23°C 21°C Sunny skies
8 m/h
clouds: 6%, 1017 hpa
Tue 25 Feb
23°C 21°C Partly cloudy skies
9 m/h
clouds: 30%, 1016 hpa
Wed 26 Feb
24°C 21°C Sunny skies
9 m/h
clouds: 24%, 1016 hpa
Wed 26 Feb
24°C 21°C Sunny skies
9 m/h
clouds: 24%, 1016 hpa
Thu 27 Feb
22°C 20°C Overcast skies
15 m/h
clouds: 93%, 1016 hpa
Fri 28 Feb
22°C 20°C Light rain shower
9 m/h
clouds: 100%, 1016 hpa
Sat 29 Feb
22°C 20°C Sunny skies
11 m/h
clouds: 13%, 1016 hpa
Sun 01 Mar
22°C 20°C Sunny skies
11 m/h
clouds: 9%, 1014 hpa
Mon 02 Mar
21°C 19°C Light rain shower
9 m/h
clouds: 93%, 1016 hpa
Tue 03 Mar
21°C 18°C Light rain
11 m/h
clouds: 99%, 1017 hpa
Wed 04 Mar
21°C 20°C Light rain shower
11 m/h
clouds: 89%, 1017 hpa
Thu 05 Mar
21°C 20°C Light rain
10 m/h
clouds: 87%, 1018 hpa
Fri 06 Mar
23°C 20°C Light rain shower
7 m/h
clouds: 83%, 1015 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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