Current sea water temperature:
+84.4°F
| Minimum sea water temperature in May: | 86.7°F |
| Maximum sea water temperature in May: | 77.4°F |
| Average sea water temperature in May: | 82.1°F |
| more information | |
14 days
forecast
forecast
| Cayo Guillermo |
monthly
weather
weather
| Cayo Guillermo |
Sea water temperature for the last 10 days:
| May 15 | 84.4°F | May 10 | 85.1°F |
| May 14 | 84.2°F | May 9 | 86.2°F |
| May 13 | 84.7°F | May 8 | 84.7°F |
| May 12 | 84.4°F | May 7 | 83.7°F |
| May 11 | 85.5°F | May 6 | 83.7°F |
Monthly sea water temperature, °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.
current
weather
weather
| Cayo Guillermo |
weather in
May
May
| Cayo Guillermo |
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: 16:26
May 15, friday
1800
82°F
SW
14 mph
14 mph
2100
81°F
W
8 mph
8 mph
May 16, saturday
0000
81°F
W
7 mph
7 mph
0300
81°F
NW
10 mph
10 mph
0600
81°F
NW
8 mph
8 mph
0900
82°F
W
11 mph
11 mph
1200
82°F
W
12 mph
12 mph
1500
82°F
W
14 mph
14 mph
