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

Halong Bay Weather

IN A NUTSHELL
  • 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

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

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

Mon 20 Jan
18°C 17°C Overcast skies
14 m/h
clouds: 100%, 1020 hpa
Tue 21 Jan
23°C 21°C Light rain shower
12 m/h
clouds: 61%, 1018 hpa
Wed 22 Jan
24°C 21°C Light rain shower
7 m/h
clouds: 73%, 1015 hpa
Thu 23 Jan
23°C 20°C Overcast skies
7 m/h
clouds: 93%, 1013 hpa
Fri 24 Jan
23°C 20°C Light drizzle
8 m/h
clouds: 97%, 1011 hpa
Sat 25 Jan
21°C 19°C Moderate or heavy rain shower
17 m/h
clouds: 100%, 1013 hpa
Sun 26 Jan
18°C 16°C Overcast skies
9 m/h
clouds: 92%, 1016 hpa
Sun 26 Jan
18°C 16°C Overcast skies
9 m/h
clouds: 92%, 1016 hpa
Mon 27 Jan
18°C 15°C Overcast skies
12 m/h
clouds: 100%, 1014 hpa
Tue 28 Jan
19°C 16°C Light rain
17 m/h
clouds: 100%, 1010 hpa
Wed 29 Jan
20°C 16°C Cloudy skies
20 m/h
clouds: 75%, 1013 hpa
Thu 30 Jan
18°C 16°C Overcast skies
17 m/h
clouds: 99%, 1018 hpa
Fri 31 Jan
16°C 13°C Overcast skies
14 m/h
clouds: 100%, 1021 hpa
Sat 01 Feb
18°C 16°C Overcast skies
14 m/h
clouds: 100%, 1016 hpa
Sun 02 Feb
21°C 19°C Moderate or heavy rain shower
6 m/h
clouds: 100%, 1016 hpa
Mon 03 Feb
18°C 15°C Moderate rain
21 m/h
clouds: 100%, 1019 hpa
Tue 04 Feb
17°C 14°C Light rain
26 m/h
clouds: 100%, 1020 hpa

Monthly Weather Averages

Month
High / Low (°C)
Rain
January
20° / 14°
4 days
February
21° / 15°
4 days
March
23° / 18°
7 days
April
27° / 21°
6 days
May
30° / 24°
8 days
June
32° / 26°
9 days
July
32° / 26°
11 days
August
32° / 25°
12 days
September
31° / 24°
10 days
October
29° / 22°
4 days
November
26° / 19°
3 days
December
22° / 15°
3 days

Weather By Month

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