Measurements:
°C
°F
CURRENT WEATHER
10:11
Cayo Guillermo
88°F
NW 13 mph
Feels like: 98°F
Precip: 18%
World Resorts Cuba Cayo Guillermo Weather

7 Day Weather Forecast

09.13
sun
DAY
90°F
W 14 mph
precip
5%
NIGHT
88°F
W 15 mph
precip
6%
09.14
mon
DAY
90°F
W 11 mph
precip
15%
NIGHT
88°F
W 16 mph
precip
13%
09.15
tue
DAY
88°F
W 14 mph
precip
59%
NIGHT
88°F
W 17 mph
precip
67%
09.16
wed
DAY
88°F
W 9 mph
precip
20%
NIGHT
86°F
NW 16 mph
precip
59%
09.17
thu
DAY
88°F
W 11 mph
precip
14%
NIGHT
86°F
NW 11 mph
precip
18%
09.18
fri
DAY
90°F
W 11 mph
precip
12%
NIGHT
84°F
SW 11 mph
precip
24%
09.19
sat
DAY
90°F
W 14 mph
precip
46%
NIGHT
86°F
N 5 mph
precip
35%

Cayo Guillermo Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Cayo Guillermo was 30.7°F. The maximum and minimum values were 30.3°F and 31.3°F respectively.

Cayo Guillermo on the Weather Map

Best Time to Visit Cayo Guillermo
The most sunny months:
April 14 days
March 13 days
May 12 days
The most warm months:
August 91.0 °F
July 90.5 °F
September 90.0 °F
Warmest sea temperature:
September 90.0 °F
August 90.0 °F
July 89.2 °F
The most cold months:
January 79.5 °F
February 80.4 °F
March 81.4 °F
The most rainy months:
October 7 days
May 6 days
August 5 days
The most windy months:
March 14 mph
November 14 mph
December 14 mph
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