Weather in Cayo Guillermo: August
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Average day temperature: | 86.9°F |
| Average night temperature: | 81.1°F | |
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Sea water temperature: | 85.9°F |
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Number of sunny days: | 11 days |
| Day length: | 12.6 - 13.2 hours | |
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Number of rainy days: | 6 days |
| Precipitation totals: | 3.6 in. | |
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forecast
| Cayo Guillermo |
temperature
| Cayo Guillermo |
Air temperature in August, °F
The highest day temperature during August of 2025 was 86°F. At the same time the lowest night temperature was 81°F. Daily and nightly averages during August were 84.7°F and 83.3°F.
Sea water temperature in Cayo Guillermo in August, °F
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.
Mostly all days in August are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in Cayo Guillermo in August is 4.1 in. Other months of the year show relatively similar values.
The average wind speed value in August is 13.1 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 7.3.
Best time for vacation in Cayo Guillermo
Cayo Guillermo on a weather map
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