World Resorts Vietnam Cat Ba Island Weather

Cat Ba Island weather in August

Weather in Cat Ba Island: August

Average day temperature: 88.9°F
Average night temperature: 83.1°F
Sea water temperature: 86.6°F
Number of sunny days: 11 days
Day length: 12.5 - 13.1 hours
Number of rainy days: 14 days
Precipitation totals: 11.0 in.

Air temperature in August, °F

Show year:
2025
2024
2023

The highest day temperature during August of 2025 was 91°F. At the same time the lowest night temperature was 77°F. Daily and nightly averages during August were 85.1°F and 81.2°F.

Sea water temperature in Cat Ba Island 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.

Sunny, partly cloudy and cloudy days

Number of sunny, partly cloudy and cloudy days in August is almost equal.

Precipitation total in August, in.

Precipitation total value in Cat Ba Island in August is 9.9 in. Other months of the year show relatively similar values.

Wind speed in August, mph

The average wind speed value in August is 8.3 mph It makes August one of the least windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 5.9.

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 68.2 °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
January 9.8 mph

Cat Ba Island on a weather map

Cat Ba Island
+70°F
SW 14 mph
Feels like: +70°F
Precip.: 0%
Places in Vietnam:
Name
°F
+79°F
+84°F
+73°F
+75°F
+77°F
+77°F
+70°F
+82°F
+79°F
+77°F
+82°F
+84°F
+66°F
+68°F
+86°F
24 Hours Forecast
Cat Ba Island
Local time: 11:41
December 05, friday
1200
70°F
SW
14 mph
1500
70°F
W
12 mph
1800
68°F
W
12 mph
2100
68°F
SW
8 mph
December 06, saturday
0000
66°F
SW
6 mph
0300
66°F
SW
7 mph
0600
66°F
SW
8 mph
0900
68°F
W
11 mph
Units of measurement: °C / °F