Current sea water temperature:
+86.0°F
| Minimum sea water temperature in July: | 89.2°F |
| Maximum sea water temperature in July: | 82.4°F |
| Average sea water temperature in July: | 85.3°F |
| more information | |
14 days
forecast
forecast
| Cayo Guillermo |
monthly
weather
weather
| Cayo Guillermo |
Sea water temperature for the last 10 days:
| July 15 | 86.0°F | July 10 | 85.8°F |
| July 14 | 85.8°F | July 9 | 86.5°F |
| July 13 | 86.9°F | July 8 | 87.4°F |
| July 12 | 85.6°F | July 7 | 86.9°F |
| July 11 | 85.8°F | July 6 | 87.1°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 86.5°F. The highest and lowest sea temperatures during the month were 87.4°F and 85.6°F.
current
weather
weather
| Cayo Guillermo |
weather in
July
July
| 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: 07:15
July 15, wednesday
0900
84°F
W
17 mph
17 mph
1200
84°F
W
18 mph
18 mph
1500
84°F
W
17 mph
17 mph
1800
84°F
W
16 mph
16 mph
2100
82°F
W
16 mph
16 mph
July 16, thursday
0000
82°F
W
17 mph
17 mph
0300
82°F
W
17 mph
17 mph
0600
82°F
W
17 mph
17 mph
