Current sea water temperature:
+79.9°F
| Minimum sea water temperature in March: | 81.9°F |
| Maximum sea water temperature in March: | 75.4°F |
| Average sea water temperature in March: | 78.4°F |
| more information | |
14 days
forecast
forecast
| Cayo Guillermo |
monthly
weather
weather
| Cayo Guillermo |
Sea water temperature for the last 10 days:
| March 15 | 79.9°F | March 10 | 79.2°F |
| March 14 | 79.9°F | March 9 | 78.4°F |
| March 13 | 78.6°F | March 8 | 78.6°F |
| March 12 | 78.8°F | March 7 | 78.1°F |
| March 11 | 79.0°F | March 6 | 78.4°F |
Monthly sea water temperature, °F
When is the warmest sea in Cayo Guillermo?
Based on the data about daily sea water temperature for the last three years the warmest sea in Cayo Guillermo was noticed in September, August and July.
Monthly Sea Temperatures in Cayo Guillermo, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 87.3°F. The highest and lowest sea temperatures during the month were 88.3°F and 86.5°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 88.5°F and 85.8°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 85.3°F. The highest and lowest sea temperatures during the month were 86.2°F and 83.8°F.
current
weather
weather
| Cayo Guillermo |
weather in
March
March
| Cayo Guillermo |
Best time for vacation in Cayo Guillermo
Cayo Guillermo on a weather map
Places in Cuba:
Name
°F
24 Hours Forecast
Cayo Guillermo
Local time: 16:59
March 15, sunday
1800
79°F
W
22 mph
22 mph
2100
77°F
W
21 mph
21 mph
March 16, monday
0000
77°F
NW
19 mph
19 mph
0300
77°F
NW
17 mph
17 mph
0600
77°F
NW
14 mph
14 mph
0900
77°F
NW
12 mph
12 mph
1200
79°F
NW
9 mph
9 mph
1500
79°F
SW
12 mph
12 mph
