Weather in Ha Long: May
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Average day temperature: | 85.2°F |
| Average night temperature: | 79.3°F | |
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Sea water temperature: | 82.1°F |
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Number of sunny days: | 10 days |
| Day length: | 12.9 - 13.3 hours | |
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Number of rainy days: | 7 days |
| Precipitation totals: | 3.8 in. | |
| more information | ||
14 days
forecast
forecast
| Ha Long |
sea water
temperature
temperature
| Ha Long |
Air temperature in May, °F
Show year:
2025
2024
2023
The highest day temperature during May of 2025 was 87°F. At the same time the lowest night temperature was 68°F. Daily and nightly averages during May were 82.7°F and 75.7°F.
Sea water temperature in Ha Long in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 81.6°F. The highest and lowest sea temperatures during the month were 82.9°F and 77.7°F.
Sunny, partly cloudy and cloudy days
Mostly all days in May are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Ha Long in May is 3.7 in.
Wind speed in May, mph
The average wind speed value in May is 8.0 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 5.5.
Best time for vacation in Ha Long
Ha Long on a weather map
Places in Vietnam:
Name
°F
24 Hours Forecast
Ha Long
Local time: 08:23
December 19, friday
0900
70°F
SW
5 mph
5 mph
1200
73°F
W
7 mph
7 mph
1500
72°F
W
6 mph
6 mph
1800
66°F
W
5 mph
5 mph
2100
66°F
SW
5 mph
5 mph
December 20, saturday
0000
64°F
SW
5 mph
5 mph
0300
64°F
SW
5 mph
5 mph
0600
66°F
SW
5 mph
5 mph
