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Ha Long Bay, Vietnam Weather Averages

June is the hottest month in Ha Long Bay with an average temperature of 29°C (84°F) and the coldest is January at 17°C (63°F) with the most daily sunshine hours at 8 in December. The wettest month is August with an average of 265mm of rain. The best month to swim in the sea is in January when the average sea temperature is 29°C (84°F).

Average Temperature Ha Long Bay

What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month

Average High Low Temperature Ha Long Bay

What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

Average Rainfall Ha Long Bay

What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

Average Daily Sunshine Hours Ha Long Bay

What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer
What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer

Average Sea Temperature Ha Long Bay

What is Average Sea Temperature?
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface
What is Average Sea Temperature?
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface

Ha Long Bay : Next 24-Hour Weather

Today - 30th July 2025

Sunrise 05:25

Sunrise

Sunset 18:31

Sunset
22:00
Clear
29°C (83°F)
23:00
Thundery outbreaks possible
29°C (83°F)

Tomorrow - 31st July 2025

Sunrise 05:25

Sunrise

Sunset 18:31

Sunset
0:00
Clear
29°C (83°F)
1:00
Clear
29°C (83°F)
2:00
Clear
28°C (82°F)
3:00
Thundery outbreaks possible
28°C (82°F)
4:00
Thundery outbreaks possible
28°C (82°F)
5:00
Clear
28°C (82°F)
6:00
Clear
28°C (82°F)
7:00
Clear
29°C (84°F)
8:00
Clear
31°C (87°F)
9:00
Clear
32°C (89°F)
10:00
Clear
33°C (91°F)
11:00
Thundery outbreaks possible
34°C (92°F)
12:00
Thundery outbreaks possible
33°C (91°F)
13:00
Thundery outbreaks possible
33°C (91°F)
14:00
Patchy light rain with thunder
33°C (91°F)
15:00
Light rain shower
31°C (88°F)
16:00
Patchy light rain with thunder
31°C (86°F)
17:00
Patchy rain possible
30°C (85°F)
18:00
Patchy light rain with thunder
29°C (84°F)
19:00
Partly cloudy
29°C (83°F)
20:00
Partly cloudy
29°C (83°F)
21:00
Patchy rain possible
29°C (83°F)
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