World Resorts Cayman Islands Grand Cayman Weather

Grand Cayman Sea Temperature in September

Average sea water temperature in September:
+86.1°F
Minimum sea water temperature in September: 88.3°F
Maximum sea water temperature in September: 83.8°F

Daily sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 87.4°F. The highest and lowest sea temperatures during the month were 88.3°F and 86.0°F.

Monthly sea water temperature in Grand Cayman, °F

Which Cayman Islands resorts have warmest sea in September?

Place name September 2026 September 2025
Grand Cayman 87.4°F 87.4°F
George Town 87.4°F 87.4°F
Little Cayman 87.0°F 87.5°F
Cayman Brac 86.9°F 87.6°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
July 86.8 °F
September 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 7 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
11:04
Grand Cayman
+81°F
NW 14 mph
Feels like: +86°F
Precip.: 25%
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: 11:04
November 03, tuesday
1200
81°F
NW
14 mph
1500
81°F
NW
11 mph
1800
79°F
W
10 mph
2100
81°F
W
10 mph
November 04, wednesday
0000
81°F
W
14 mph
0300
81°F
W
14 mph
0600
81°F
W
11 mph
0900
81°F
W
8 mph
Units of measurement: °C / °F