World Resorts Vietnam Cat Ba Island Weather

Cat Ba Island sea water temperature

Current sea water temperature:
+84.2°F
Minimum sea water temperature in May: 87.6°F
Maximum sea water temperature in May: 76.1°F
Average sea water temperature in May: 82.2°F

Sea water temperature for the last 10 days:

May 18 84.2°F May 13 81.7°F
May 17 84.6°F May 12 82.0°F
May 16 84.7°F May 11 80.8°F
May 15 84.0°F May 10 80.8°F
May 14 83.7°F May 9 81.5°F

When is the warmest sea in Cat Ba Island?

Based on the data about daily sea water temperature for the last three years the warmest sea in Cat Ba Island was noticed in July, August and June.

Monthly Sea Temperatures in Cat Ba Island, °F

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 86.8°F. The highest and lowest sea temperatures during the month were 88.7°F and 84.7°F.

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 86.7°F. The highest and lowest sea temperatures during the month were 88.9°F and 83.7°F.

Sea water temperature in June, °F

Show year:
2025
2024
2023

The average sea water temperature in June of 2025 was 85.4°F. The highest and lowest sea temperatures during the month were 86.5°F and 84.0°F.

Best time for vacation in Cat Ba Island

Sunniest months:
October 14 days
June 12 days
September 12 days
Warmest months:
August 88.9 °F
July 88.9 °F
June 88.2 °F
Warmest sea temp:
July 86.8 °F
August 86.6 °F
June 86.3 °F
Coldest months:
January 66.9 °F
February 68.3 °F
December 69.3 °F
Rainiest months:
July 15 days
August 14 days
June 12 days
Windiest months:
June 10.6 mph
July 10.1 mph
October 9.7 mph

Cat Ba Island on a weather map

Cat Ba Island
+81°F
W 10 mph
Feels like: +88°F
Precip.: 77%
Places in Vietnam:
Name
°F
+81°F
+82°F
+68°F
+77°F
+81°F
+79°F
+81°F
+81°F
+81°F
+81°F
+82°F
+81°F
+79°F
+77°F
+86°F
24 Hours Forecast
Cat Ba Island
Local time: 21:34
May 19, tuesday
0000
81°F
NW
9 mph
0300
79°F
NW
8 mph
0600
79°F
NW
5 mph
0900
81°F
N
9 mph
1200
81°F
NW
10 mph
1500
82°F
NW
13 mph
1800
81°F
NW
11 mph
2100
81°F
NW
12 mph
Units of measurement: °C / °F