Measurements:
°C
°F
CURRENT WEATHER
15:38
Cayo Guillermo
78°F
SW 22 mph
Feels like: 82°F
Precip: 0%
World Resorts Cuba Cayo Guillermo Weather

7 Day Weather Forecast

12.16
tue
DAY
78°F
SW 22 mph
precip
63%
NIGHT
78°F
W 25 mph
precip
0%
12.17
wed
DAY
80°F
SW 20 mph
precip
0%
NIGHT
80°F
W 17 mph
precip
0%
12.18
thu
DAY
82°F
W 11 mph
precip
0%
NIGHT
82°F
NW 12 mph
precip
0%
12.19
fri
DAY
80°F
SW 2 mph
precip
0%
NIGHT
80°F
SW 11 mph
precip
0%
12.20
sat
DAY
80°F
SW 16 mph
precip
100%
NIGHT
80°F
W 17 mph
precip
88%
12.21
sun
DAY
82°F
W 16 mph
precip
100%
NIGHT
80°F
W 18 mph
precip
100%
12.22
mon
DAY
80°F
SW 17 mph
precip
100%
NIGHT
80°F
SW 25 mph
precip
67%

Cayo Guillermo Sea Water Temperature in December, °F

Select Year: 2025 2024 2023

The average sea surface temperature in December 2025 for Cayo Guillermo was 27.1°F. The maximum and minimum values were 26.1°F and 27.8°F respectively.

Cayo Guillermo on the Weather Map

Best Time to Visit Cayo Guillermo
The most sunny months:
April 13 days
March 12 days
May 11 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 89.9 °F
July 89.2 °F
The most cold months:
January 79.6 °F
February 80.7 °F
March 81.5 °F
The most rainy months:
May 7 days
October 7 days
August 6 days
The most windy months:
March 14 mph
November 14 mph
December 14 mph
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