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

Thu 01 Oct
36°C 30°C Moderate or heavy rain shower
14 m/h
clouds: 60%, 1008 hpa
Fri 02 Oct
35°C 30°C Light rain shower
12 m/h
clouds: 68%, 1009 hpa
Sat 03 Oct
35°C 30°C Light rain shower
7 m/h
clouds: 60%, 1010 hpa
Sun 04 Oct
37°C 31°C Moderate or heavy rain shower
4 m/h
clouds: 28%, 1010 hpa
Mon 05 Oct
36°C 30°C Patchy rain possible
13 m/h
clouds: 15%, 1011 hpa
Tue 06 Oct
32°C 28°C Moderate or heavy rain shower
13 m/h
clouds: 55%, 1012 hpa
Wed 07 Oct
33°C 28°C Light rain shower
19 m/h
clouds: 87%, 1014 hpa
Wed 07 Oct
33°C 28°C Light rain shower
19 m/h
clouds: 87%, 1014 hpa
Thu 08 Oct
28°C 26°C Light rain shower
14 m/h
clouds: 67%, 1013 hpa
Fri 09 Oct
32°C 27°C Moderate or heavy rain shower
13 m/h
clouds: 69%, 1014 hpa
Sat 10 Oct
28°C 26°C Moderate or heavy rain shower
14 m/h
clouds: 45%, 1012 hpa
Sun 11 Oct
28°C 26°C Patchy rain possible
10 m/h
clouds: 29%, 1011 hpa
Mon 12 Oct
32°C 27°C Moderate or heavy rain shower
12 m/h
clouds: 65%, 1009 hpa
Tue 13 Oct
32°C 27°C Moderate or heavy rain shower
15 m/h
clouds: 57%, 1010 hpa
Wed 14 Oct
28°C 26°C Patchy rain possible
9 m/h
clouds: 21%, 1008 hpa
Thu 15 Oct
28°C 26°C Clear skies
9 m/h
clouds: 23%, 1006 hpa
Fri 16 Oct
36°C 30°C Partly cloudy skies
5 m/h
clouds: 25%, 1005 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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