Measurements:
°C
°F
Cat Ba Island
84°F
SW 17 mph
Feels like: 90°F
Precip: 17%
World Resorts Vietnam Cat Ba Island Weather

Cat Ba Island Sea Water Temperature

Current Sea Water Temperature:
+86.4°F
Maximum Sea Water Temperature in November: 86.6°F
Minimum Sea Water Temperature in November: 74.2°F
Average water temperature in November: 81.0°F

Sea Water Temperature for the Last 10 Days:

November 07 86.4°F November 02 85.4°F
November 06 85.6°F November 01 84.4°F
November 05 86.6°F October 31 85.8°F
November 04 86.2°F October 30 86.8°F
November 03 85.8°F October 29 87.0°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: 2026 2025 2024

The average sea surface temperature in July 2026 for Cat Ba Island was 90.8°F. The maximum and minimum values were 88.8°F and 92.4°F respectively.

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Cat Ba Island was 90.3°F. The maximum and minimum values were 88.4°F and 92.4°F respectively.

Sea Water Temperature in June

Select Year: 2026 2025 2024

The average sea surface temperature in June 2026 for Cat Ba Island was 92.0°F. The maximum and minimum values were 89.8°F and 93.4°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 93.1 °F
July 93.0 °F
June 92.4 °F
Warmest sea temperature:
July 90.9 °F
August 90.7 °F
June 90.4 °F
The most cold months:
January 68.8 °F
February 70.3 °F
December 71.4 °F
The most rainy months:
August 14 days
July 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
F°
Cam Ranh +84
Cat Ba Island +84
Da Lat +74
Da Nang +84
Doc Let Beach +84
Ha Long +84
Ha Noi +84
Ho Chi Minh +90
Mui Ne +88
Nha Trang +84
Phan Rang +84
Phan Thiet +88
Phu Quoc +86
Vinpearl +84
Vung Tau +92
24 Hours Weather Forecast
Cat Ba Island
Local time: 09:24
08 nov, sunday
1200 84°F
W
19 mph
1500 84°F
W
19 mph
1800 82°F
SW
17 mph
2100 82°F
SW
19 mph
09 nov, monday
0000 82°F
SW
19 mph
0300 80°F
SW
21 mph
0600 74°F
S
21 mph
0900 72°F
S
22 mph