Measurements:
°C
°F
Cat Ba Island
68°F
SW 14 mph
Feels like: 68°F
Precip: 77%
World Resorts Vietnam Cat Ba Island Weather

Cat Ba Island Sea Water Temperature

Current Sea Water Temperature:
+73.0°F
Maximum Sea Water Temperature in February: 74.2°F
Minimum Sea Water Temperature in February: 63.2°F
Average water temperature in February: 68.3°F

Sea Water Temperature for the Last 10 Days:

February 17 73.0°F February 12 69.4°F
February 16 72.2°F February 11 70.0°F
February 15 71.4°F February 10 70.6°F
February 14 70.2°F February 09 70.6°F
February 13 68.0°F February 08 71.2°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
October 9 mph

Cat Ba Island on the Weather Map

Vietnam Resorts:
NAME
Cam Ranh +74
Da Lat +58
Da Nang +74
Doc Let Beach +72
Ha Long +68
Ha Noi +70
Ho Chi Minh +80
Hoi An +74
Mui Ne +70
Nha Trang +72
Phan Rang +74
Phan Thiet +70
Phu Quoc +82
Vinpearl +72
Vung Tau +72
24 Hours Weather Forecast
Cat Ba Island
Local time: 01:55
18 feb, wednesday
0300 68°F
SW
14 mph
0600 68°F
SW
14 mph
0900 70°F
SW
16 mph
1200 70°F
SW
16 mph
1500 72°F
W
16 mph
1800 70°F
SW
12 mph
2100 70°F
SW
9 mph
19 feb, thursday
0000 70°F
SW
11 mph