Measurements:
°C
°F
Cat Ba Island
60°F
S 5 mph
Feels like: 60°F
Precip: 0%
World Resorts Vietnam Cat Ba Island Weather

Cat Ba Island Sea Water Temperature

Current Sea Water Temperature:
+67.0°F
Maximum Sea Water Temperature in January: 75.2°F
Minimum Sea Water Temperature in January: 64.2°F
Average water temperature in January: 69.2°F

Sea Water Temperature for the Last 10 Days:

January 10 67.0°F January 05 70.2°F
January 09 67.0°F January 04 70.2°F
January 08 68.0°F January 03 72.2°F
January 07 69.2°F January 02 72.4°F
January 06 69.2°F January 01 72.6°F

When is the Warmest Sea for Cat Ba Island?

According to our data for the last three years for Cat Ba Island 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 Cat Ba Island was 90.9°F. The maximum and minimum values were 88.6°F and 93.0°F respectively.

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Cat Ba Island was 90.8°F. The maximum and minimum values were 87.4°F and 93.2°F respectively.

Sea Water Temperature in June

Select Year: 2025 2024 2023

The average sea surface temperature in June 2025 for Cat Ba Island was 89.3°F. The maximum and minimum values were 87.8°F and 90.6°F respectively.

Best Time to Visit Cat Ba Island
The most sunny months:
October 14 days
June 12 days
September 12 days
The most warm months:
August 93.3 °F
July 93.3 °F
June 92.5 °F
Warmest sea temperature:
July 90.9 °F
August 90.7 °F
June 90.3 °F
The most cold months:
January 68.8 °F
February 70.2 °F
December 71.4 °F
The most rainy months:
July 15 days
August 14 days
June 12 days
The most windy months:
June 11 mph
July 10 mph
January 9 mph

Cat Ba Island on the Weather Map

Vietnam Resorts:
NAME
Cam Ranh +70
Cat Ba Island +60
Da Lat +56
Da Nang +68
Doc Let Beach +70
Ha Long +58
Ha Noi +62
Ho Chi Minh +74
Mui Ne +72
Nha Trang +70
Phan Rang +70
Phan Thiet +72
Phu Quoc +74
Vinpearl +70
Vung Tau +68
24 Hours Weather Forecast
Cat Ba Island
Local time: 03:20
11 jan, sunday
0600 60°F
S
2 mph
0900 66°F
NW
2 mph
1200 70°F
W
7 mph
1500 68°F
W
12 mph
1800 64°F
W
9 mph
2100 62°F
W
6 mph
12 jan, monday
0000 62°F
W
8 mph
0300 62°F
W
9 mph