Current sea water temperature:
+81.3°F
| Minimum sea water temperature in March: | 82.4°F |
| Maximum sea water temperature in March: | 78.8°F |
| Average sea water temperature in March: | 80.8°F |
| more information | |
14 days
forecast
forecast
| Grand Cayman |
monthly
weather
weather
| Grand Cayman |
Sea water temperature for the last 10 days:
| March 20 | 81.3°F | March 15 | 81.0°F |
| March 19 | 81.1°F | March 14 | 81.1°F |
| March 18 | 81.1°F | March 13 | 81.1°F |
| March 17 | 81.5°F | March 12 | 80.8°F |
| March 16 | 81.5°F | March 11 | 80.8°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
March
March
| 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: 14:43
March 20, friday
1500
81°F
S
22 mph
22 mph
1800
81°F
S
21 mph
21 mph
2100
79°F
S
19 mph
19 mph
March 21, saturday
0000
77°F
S
21 mph
21 mph
0300
77°F
SW
21 mph
21 mph
0600
75°F
SW
24 mph
24 mph
0900
75°F
SW
22 mph
22 mph
1200
77°F
SW
19 mph
19 mph
