Current sea water temperature:
+85.5°F
| Minimum sea water temperature in July: | 87.3°F |
| Maximum sea water temperature in July: | 82.9°F |
| Average sea water temperature in July: | 85.0°F |
| more information | |
14 days
forecast
forecast
| Grand Cayman |
monthly
weather
weather
| Grand Cayman |
Sea water temperature for the last 10 days:
| July 23 | 85.5°F | July 18 | 84.6°F |
| July 22 | 85.6°F | July 17 | 85.1°F |
| July 21 | 84.9°F | July 16 | 84.7°F |
| July 20 | 84.6°F | July 15 | 85.1°F |
| July 19 | 84.0°F | July 14 | 85.5°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:
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.
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
July
July
| 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: 18:19
July 23, thursday
2100
84°F
NW
9 mph
9 mph
July 24, friday
0000
84°F
NW
11 mph
11 mph
0300
82°F
N
9 mph
9 mph
0600
82°F
NW
6 mph
6 mph
0900
82°F
W
7 mph
7 mph
1200
82°F
W
6 mph
6 mph
1500
84°F
W
6 mph
6 mph
1800
84°F
W
9 mph
9 mph
