World Resorts Cuba Cayo Guillermo Weather

Cayo Guillermo sea water temperature

Current sea water temperature:
+78.4°F
Minimum sea water temperature in February: 80.4°F
Maximum sea water temperature in February: 74.8°F
Average sea water temperature in February: 77.7°F

Sea water temperature for the last 10 days:

February 2 78.4°F January 28 80.2°F
February 1 78.8°F January 27 79.0°F
January 31 79.3°F January 26 79.0°F
January 30 79.7°F January 25 78.6°F
January 29 79.9°F January 24 77.4°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:
2025
2024
2023

The average sea water temperature in July of 2025 was 85.3°F. The highest and lowest sea temperatures during the month were 86.2°F and 83.8°F.

Best time for vacation in Cayo Guillermo

Sunniest months:
April 13 days
March 12 days
May 11 days
Warmest months:
August 86.9 °F
July 86.5 °F
September 86.0 °F
Warmest sea temp:
September 86.0 °F
August 85.9 °F
July 85.2 °F
Coldest months:
January 76.6 °F
February 77.6 °F
March 78.4 °F
Rainiest months:
May 7 days
October 7 days
August 6 days
Windiest months:
March 14.5 mph
November 14.2 mph
December 14.0 mph

Cayo Guillermo on a weather map

Cayo Guillermo
+63°F
S 20 mph
Feels like: +63°F
Precip.: 0%
Places in Cuba:
Name
°F
+66°F
+59°F
+61°F
+61°F
+52°F
+57°F
+59°F
+59°F
+63°F
+54°F
+52°F
24 Hours Forecast
Cayo Guillermo
Local time: 20:47
February 02, monday
2100
63°F
S
20 mph
February 03, tuesday
0000
63°F
SW
20 mph
0300
63°F
SW
17 mph
0600
66°F
SW
18 mph
0900
68°F
SW
17 mph
1200
68°F
SW
17 mph
1500
70°F
W
17 mph
1800
70°F
W
18 mph
Units of measurement: °C / °F