World Resorts Cayman Islands Grand Cayman Weather

Grand Cayman Sea Temperature in October

Average sea water temperature in October:
+85.5°F
Minimum sea water temperature in October: 88.5°F
Maximum sea water temperature in October: 83.7°F

Daily sea water temperature in October, °F

Show year:
2025
2024
2023

The average sea water temperature in October of 2025 was 86.6°F. The highest and lowest sea temperatures during the month were 88.3°F and 85.3°F.

Monthly sea water temperature in Grand Cayman, °F

Which Cayman Islands resorts have warmest sea in October?

Place name October 2025 October 2024
Cayman Brac 86.8°F 86.2°F
Little Cayman 86.7°F 86.0°F
Grand Cayman 86.6°F 85.6°F
George Town 86.6°F 85.7°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 16.7 mph
November 16.1 mph
January 15.7 mph

Grand Cayman on a weather map

Current weather
10:55
Grand Cayman
+81°F
W 18 mph
Feels like: +86°F
Precip.: 0%
Places in Cayman Islands:
Name
°F
Grand Cayman
+81°F
George Town
+81°F
Cayman Brac
+79°F
Little Cayman
+79°F
24 Hours Forecast
Grand Cayman
Local time: 10:55
December 28, sunday
1200
81°F
W
18 mph
1500
79°F
W
16 mph
1800
79°F
W
19 mph
2100
79°F
W
19 mph
December 29, monday
0000
77°F
W
19 mph
0300
77°F
W
16 mph
0600
77°F
W
16 mph
0900
79°F
W
14 mph
Units of measurement: °C / °F