World Resorts Vietnam Cat Ba Island Weather

Cat Ba Island sea water temperature

Current sea water temperature:
+83.1°F
Minimum sea water temperature in September: 89.2°F
Maximum sea water temperature in September: 81.7°F
Average sea water temperature in September: 85.8°F

Sea water temperature for the last 10 days:

September 20 83.1°F September 15 85.3°F
September 19 83.5°F September 14 85.3°F
September 18 83.1°F September 13 85.1°F
September 17 84.6°F September 12 85.8°F
September 16 84.9°F September 11 86.4°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:
2026
2025
2024

The average sea water temperature in July of 2026 was 86.7°F. The highest and lowest sea temperatures during the month were 88.2°F and 84.9°F.

Sea water temperature in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 86.2°F. The highest and lowest sea temperatures during the month were 88.2°F and 84.6°F.

Sea water temperature in June, °F

Show year:
2026
2025
2024

The average sea water temperature in June of 2026 was 87.8°F. The highest and lowest sea temperatures during the month were 89.1°F and 85.8°F.

Best time for vacation in Cat Ba Island

Sunniest months:
October 14 days
June 12 days
September 12 days
Warmest months:
August 88.8 °F
July 88.7 °F
June 88.2 °F
Warmest sea temp:
July 86.8 °F
August 86.6 °F
June 86.4 °F
Coldest months:
January 66.9 °F
February 68.3 °F
December 69.3 °F
Rainiest months:
August 14 days
July 14 days
June 12 days
Windiest months:
June 10.6 mph
July 10.0 mph
October 9.7 mph

Cat Ba Island on a weather map

Cat Ba Island
+84°F
SW 3 mph
Feels like: +90°F
Precip.: 5%
Places in Vietnam:
Name
°F
+79°F
+75°F
+68°F
+79°F
+79°F
+81°F
+79°F
+79°F
+81°F
+79°F
+82°F
+84°F
+86°F
+79°F
+81°F
24 Hours Forecast
Cat Ba Island
Local time: 08:15
September 21, monday
0900
84°F
SW
3 mph
1200
86°F
NW
4 mph
1500
86°F
NW
7 mph
1800
82°F
NW
6 mph
2100
81°F
W
4 mph
September 22, tuesday
0000
81°F
SW
1 mph
0300
79°F
S
2 mph
0600
79°F
SE
4 mph
Units of measurement: °C / °F