Measurements:
°C
°F
Ha Long
70°F
SW 8 mph
Feels like: 70°F
Precip: 0%
World Resorts Vietnam Ha Long Weather May Weather in Ha Long

Ha Long Weather: May

Average Day Temperature: 89.2°F
Average Night Temperature: 82.6°F
Sea Water Temperature: 85.7°F
Number of Sunny Days: 10 days
Sunshine Hours: 12.9 - 13.3 hours
Number of Rainy Days: 7 days
Precipitation Totals: 3.8 in

Air Temperature in May, °F

Select Year: 2025 2024 2023

The highest day temperature in May 2025 was 92°F. The lowest night temperature was 70°F. The average values for day and night temperatures during May were 86.3°F и 78.5°F respectivly.

Ha Long Water Sea Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Ha Long was 85.1°F. The maximum and minimum values were 80.8°F and 86.6°F respectively.

Sunny, Cloudy and Gloomy days

Most of the days in May are cloudy but you can also expect sunny or gloomy days.

Precipitation Totals in May, in

Precipitation total in May for Ha Long is 3.8 in.

Wind Speed in May, mph

The average wind speed in May is 8.7 mph. This value is relatively stable throughout the year.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Ha Long in May is 7.3 hours.

Best Time to Visit Ha Long
The most sunny months:
October 13 days
June 12 days
September 12 days
The most warm months:
July 93.4 °F
August 92.8 °F
June 92.7 °F
Warmest sea temperature:
July 90.9 °F
August 90.7 °F
June 90.3 °F
The most cold months:
January 69.1 °F
February 70.5 °F
December 71.6 °F
The most rainy months:
July 14 days
August 14 days
June 11 days
The most windy months:
June 10 mph
July 9 mph
October 9 mph

Ha Long on the Weather Map

Vietnam Resorts:
NAME
Cam Ranh +80
Cat Ba Island +72
Da Lat +76
Da Nang +78
Doc Let Beach +80
Ha Long +70
Ha Noi +68
Ho Chi Minh +90
Mui Ne +86
Nha Trang +82
Phan Rang +80
Phan Thiet +86
Phu Quoc +88
Vinpearl +82
Vung Tau +88
24 Hours Weather Forecast
Ha Long
Local time: 11:06
05 dec, friday
1200 70°F
SW
8 mph
1500 72°F
W
7 mph
1800 70°F
SW
7 mph
2100 68°F
SW
4 mph
06 dec, saturday
0000 68°F
SW
4 mph
0300 66°F
SW
4 mph
0600 66°F
SW
4 mph
0900 70°F
W
6 mph