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 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

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

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

Sat 16 Jan
20°C 17°C Cloudy skies
9 m/h
clouds: 84%, 1015 hpa
Sun 17 Jan
18°C 16°C Cloudy skies
15 m/h
clouds: 72%, 1026 hpa
Mon 18 Jan
18°C 15°C Sunny skies
7 m/h
clouds: 8%, 1023 hpa
Tue 19 Jan
21°C 18°C Sunny skies
6 m/h
clouds: 3%, 1017 hpa
Wed 20 Jan
19°C 16°C Overcast skies
7 m/h
clouds: 100%, 1016 hpa
Thu 21 Jan
22°C 19°C Partly cloudy skies
13 m/h
clouds: 54%, 1012 hpa
Fri 22 Jan
22°C 19°C Cloudy skies
10 m/h
clouds: 78%, 1010 hpa
Fri 22 Jan
22°C 19°C Cloudy skies
10 m/h
clouds: 78%, 1010 hpa
Sat 23 Jan
21°C 18°C Light rain shower
7 m/h
clouds: 61%, 1009 hpa
Sun 24 Jan
22°C 19°C Light rain shower
9 m/h
clouds: 66%, 1010 hpa
Mon 25 Jan
20°C 17°C Light drizzle
11 m/h
clouds: 75%, 1012 hpa
Tue 26 Jan
21°C 18°C Partly cloudy skies
10 m/h
clouds: 44%, 1013 hpa
Wed 27 Jan
20°C 17°C Light rain
13 m/h
clouds: 100%, 1013 hpa
Thu 28 Jan
20°C 17°C Light rain shower
11 m/h
clouds: 100%, 1012 hpa
Fri 29 Jan
20°C 17°C Light rain shower
13 m/h
clouds: 82%, 1014 hpa
Sat 30 Jan
20°C 17°C Cloudy skies
10 m/h
clouds: 63%, 1014 hpa
Sun 31 Jan
17°C 14°C Partly cloudy skies
10 m/h
clouds: 56%, 1014 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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