Measurements:
°C
°F
Ha Long
86°F
NW 5 mph
Feels like: 94°F
Precip: 9%
World Resorts Vietnam Ha Long Weather

Ha Long Sea Water Temperature

Current Sea Water Temperature:
+92.8°F
Maximum Sea Water Temperature in June: 95.6°F
Minimum Sea Water Temperature in June: 85.0°F
Average water temperature in June: 90.3°F

Sea Water Temperature for the Last 10 Days:

June 01 92.8°F May 27 94.2°F
May 31 92.4°F May 26 92.4°F
May 30 92.0°F May 25 91.0°F
May 29 93.2°F May 24 89.2°F
May 28 94.6°F May 23 87.6°F

When is the Warmest Sea for Ha Long?

According to our data for the last three years for Ha Long the highest average sea water temperature was in July, August and June.

Average Water Temperature by Month, °F

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Ha Long was 90.9°F. The maximum and minimum values were 88.6°F and 93.4°F respectively.

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Ha Long was 90.8°F. The maximum and minimum values were 88.2°F and 92.6°F respectively.

Sea Water Temperature in June

Select Year: 2025 2024 2023

The average sea surface temperature in June 2025 for Ha Long was 89.4°F. The maximum and minimum values were 86.4°F and 91.0°F respectively.

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 70.7 °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 +78
Da Lat +66
Da Nang +80
Doc Let Beach +80
Ha Long +86
Ha Noi +86
Ho Chi Minh +80
Hoi An +80
Mui Ne +80
Nha Trang +80
Phan Rang +80
Phan Thiet +80
Phu Quoc +86
Vinpearl +78
Vung Tau +78
24 Hours Weather Forecast
Ha Long
Local time: 00:25
03 jun, wednesday
0300 86°F
N
6 mph
0600 88°F
N
7 mph
0900 92°F
N
8 mph
1200 92°F
N
9 mph
1500 90°F
NW
7 mph
1800 90°F
NW
7 mph
2100 86°F
NW
3 mph
04 jun, thursday
0000 86°F
W
5 mph