World Resorts Cayman Islands Grand Cayman Weather

Grand Cayman 14 Days Forecast

02.09
wed
Day
86°F
NW 7 mph
Precip.
18%
Night
84°F
SW 6 mph
Precip.
8%
03.09
thu
Day
84°F
W 6 mph
Precip.
11%
Night
86°F
W 9 mph
Precip.
12%
04.09
fri
Day
86°F
W 9 mph
Precip.
17%
Night
86°F
W 9 mph
Precip.
7%
05.09
sat
Day
86°F
W 8 mph
Precip.
16%
Night
86°F
W 6 mph
Precip.
12%
06.09
sun
Day
86°F
NW 5 mph
Precip.
6%
Night
86°F
W 9 mph
Precip.
11%
07.09
mon
Day
86°F
W 11 mph
Precip.
6%
Night
86°F
W 11 mph
Precip.
13%
08.09
tue
Day
86°F
W 12 mph
Precip.
19%
Night
86°F
W 7 mph
Precip.
15%
09.09
wed
Day
86°F
SW 11 mph
Precip.
13%
Night
84°F
SW 9 mph
Precip.
40%
10.09
thu
Day
86°F
W 12 mph
Precip.
17%
Night
84°F
W 7 mph
Precip.
6%
11.09
fri
Day
86°F
SW 7 mph
Precip.
10%
Night
84°F
W 4 mph
Precip.
5%
12.09
sat
Day
84°F
W 3 mph
Precip.
6%
Night
86°F
NW 7 mph
Precip.
6%
13.09
sun
Day
86°F
W 11 mph
Precip.
7%
Night
86°F
W 13 mph
Precip.
6%
14.09
mon
Day
86°F
SW 10 mph
Precip.
9%
Night
84°F
W 11 mph
Precip.
25%
15.09
tue
Day
84°F
W 9 mph
Precip.
27%
Night
82°F
W 14 mph
Precip.
30%

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 87.4°F. The highest and lowest sea temperatures during the month were 87.8°F and 86.9°F.

Air temperature in Grand Cayman, °F

Precipitation total in Grand Cayman, in.

* Charts above show average data for the last 3 years.

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
09:46
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: 09:46
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