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:
2025
2024
2023

The average sea water temperature in August of 2025 was 86.9°F. The highest and lowest sea temperatures during the month were 87.4°F and 85.8°F.

Monthly sea water temperature in Grand Cayman, °F

Which Cayman Islands resorts have warmest sea in August?

Place name August 2025 August 2024
Cayman Brac 87.2°F 86.9°F
Little Cayman 87.2°F 87.0°F
George Town 86.9°F 86.9°F
Grand Cayman 86.9°F 86.9°F

Best time for vacation in Grand Cayman

Sunniest months:
March 11 days
July 11 days
May 10 days
Warmest months:
August 87.1 °F
July 87.0 °F
September 86.9 °F
Warmest sea temp:
September 86.1 °F
August 85.9 °F
October 85.5 °F
Coldest months:
January 80.1 °F
February 80.5 °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
15:39
Grand Cayman
+79°F
SE 14 mph
Feels like: +84°F
Precip.: 0%
Places in Cayman Islands:
Name
°F
Grand Cayman
+79°F
George Town
+79°F
Cayman Brac
+75°F
Little Cayman
+75°F
24 Hours Forecast
Grand Cayman
Local time: 15:39
January 15, thursday
1800
79°F
SE
17 mph
2100
77°F
S
14 mph
January 16, friday
0000
77°F
S
15 mph
0300
77°F
S
19 mph
0600
75°F
SW
24 mph
0900
75°F
SW
23 mph
1200
79°F
SW
21 mph
1500
77°F
SW
19 mph
Units of measurement: °C / °F