World Resorts Cayman Islands Grand Cayman Weather

Grand Cayman Sea Temperature in August

Average sea water temperature in August:
+85.9°F
Minimum sea water temperature in August: 88.2°F
Maximum sea water temperature in August: 83.7°F

Daily sea water temperature in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 86.7°F. The highest and lowest sea temperatures during the month were 87.3°F and 86.2°F.

Monthly sea water temperature in Grand Cayman, °F

Which Cayman Islands resorts have warmest sea in August?

Place name August 2026 August 2025
Cayman Brac 87.3°F 87.2°F
Little Cayman 87.1°F 87.2°F
Grand Cayman 86.7°F 86.9°F
George Town 86.7°F 86.9°F

Best time for vacation in Grand Cayman

Sunniest months:
July 10 days
March 10 days
September 10 days
Warmest months:
August 87.0 °F
September 86.9 °F
July 86.8 °F
Warmest sea temp:
September 86.1 °F
August 86.0 °F
October 85.5 °F
Coldest months:
January 80.1 °F
February 80.3 °F
March 80.9 °F
Rainiest months:
October 8 days
May 5 days
November 5 days
Windiest months:
December 16.8 mph
November 16.1 mph
January 15.7 mph

Grand Cayman on a weather map

Current weather
09:47
Grand Cayman
+84°F
NW 8 mph
Feels like: +93°F
Precip.: 19%
Places in Cayman Islands:
Name
°F
Grand Cayman
+84°F
George Town
+84°F
Cayman Brac
+84°F
Little Cayman
+84°F
24 Hours Forecast
Grand Cayman
Local time: 09:47
September 02, wednesday
1200
86°F
NW
7 mph
1500
86°F
NW
4 mph
1800
86°F
SW
4 mph
2100
86°F
W
4 mph
September 03, thursday
0000
84°F
SW
6 mph
0300
84°F
SW
5 mph
0600
84°F
SW
4 mph
0900
84°F
W
5 mph
Units of measurement: °C / °F