24.08
mon
mon
Day
88°F
W 15 mph
Precip.
17%
17%
Night
84°F
W 17 mph
Precip.
22%
22%
25.08
tue
tue
Day
86°F
W 15 mph
Precip.
19%
19%
Night
84°F
W 19 mph
Precip.
20%
20%
26.08
wed
wed
Day
86°F
W 17 mph
Precip.
18%
18%
Night
84°F
W 17 mph
Precip.
22%
22%
27.08
thu
thu
Day
86°F
W 14 mph
Precip.
19%
19%
Night
84°F
W 16 mph
Precip.
23%
23%
28.08
fri
fri
Day
86°F
W 15 mph
Precip.
7%
7%
Night
84°F
W 17 mph
Precip.
25%
25%
29.08
sat
sat
Day
84°F
W 15 mph
Precip.
8%
8%
Night
84°F
W 19 mph
Precip.
18%
18%
30.08
sun
sun
Day
86°F
W 16 mph
Precip.
8%
8%
Night
84°F
W 19 mph
Precip.
20%
20%
sea water
temperature
temperature
| Cayo Guillermo |
monthly
weather
weather
| Cayo Guillermo |
current
weather
weather
| Cayo Guillermo |
14 days
forecast
forecast
| Cayo Guillermo |
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 86.8°F. The highest and lowest sea temperatures during the month were 87.8°F and 85.5°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.
Air temperature in Cayo Guillermo, °F
Precipitation total in Cayo Guillermo, in.
* Charts above show average data for the last 3 years.
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: 13:31
August 24, monday
1500
88°F
SW
16 mph
16 mph
1800
84°F
SW
19 mph
19 mph
2100
84°F
W
19 mph
19 mph
August 25, tuesday
0000
84°F
W
17 mph
17 mph
0300
84°F
W
18 mph
18 mph
0600
84°F
W
15 mph
15 mph
0900
84°F
W
14 mph
14 mph
1200
86°F
W
15 mph
15 mph
