Current sea water temperature:
+87.4°F
| Minimum sea water temperature in September: | 87.8°F |
| Maximum sea water temperature in September: | 83.8°F |
| Average sea water temperature in September: | 86.1°F |
| more information | |
14 days
forecast
forecast
| Grand Cayman |
monthly
weather
weather
| Grand Cayman |
Sea water temperature for the last 10 days:
| September 2 | 87.4°F | August 28 | 86.9°F |
| September 1 | 87.4°F | August 27 | 87.3°F |
| August 31 | 87.1°F | August 26 | 87.3°F |
| August 30 | 87.1°F | August 25 | 87.1°F |
| August 29 | 86.9°F | August 24 | 86.9°F |
Monthly sea water temperature, °F
When is the warmest sea in Grand Cayman?
Based on the data about daily sea water temperature for the last three years the warmest sea in Grand Cayman was noticed in September, August and October.
Monthly Sea Temperatures in Grand Cayman, °F
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.
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.
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.
current
weather
weather
| Grand Cayman |
weather in
September
September
| Grand Cayman |
Best time for vacation in Grand Cayman
Grand Cayman on a weather map
Places in Cayman Islands:
Name
°F
24 Hours Forecast
Grand Cayman
Local time: 08:47
September 02, wednesday
0900
84°F
NW
8 mph
8 mph
1200
86°F
NW
7 mph
7 mph
1500
86°F
NW
4 mph
4 mph
1800
86°F
SW
4 mph
4 mph
2100
86°F
W
4 mph
4 mph
September 03, thursday
0000
84°F
SW
6 mph
6 mph
0300
84°F
SW
5 mph
5 mph
0600
84°F
SW
4 mph
4 mph
