Current sea water temperature:
+85.8°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 2 | 85.8°F | June 27 | 85.5°F |
| July 1 | 85.3°F | June 26 | 85.3°F |
| June 30 | 85.3°F | June 25 | 84.9°F |
| June 29 | 85.5°F | June 24 | 84.6°F |
| June 28 | 85.6°F | June 23 | 84.6°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: 02:20
July 03, friday
0300
84°F
W
15 mph
15 mph
0600
84°F
W
14 mph
14 mph
0900
84°F
W
11 mph
11 mph
1200
84°F
W
11 mph
11 mph
1500
84°F
W
11 mph
11 mph
1800
84°F
W
9 mph
9 mph
2100
84°F
W
6 mph
6 mph
July 04, saturday
0000
84°F
NW
7 mph
7 mph
