Current Sea Water Temperature:
+83.6°F
| Maximum Sea Water Temperature in December: | 85.6°F |
| Minimum Sea Water Temperature in December: | 78.8°F |
| Average water temperature in December: | 82.3°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 04 | 83.6°F | November 29 | 83.2°F |
| December 03 | 83.2°F | November 28 | 83.6°F |
| December 02 | 82.8°F | November 27 | 82.8°F |
| December 01 | 82.2°F | November 26 | 83.0°F |
| November 30 | 83.0°F | November 25 | 82.8°F |
When is the Warmest Sea for Cayo Guillermo?
According to our data for the last three years for Cayo Guillermo the highest average sea water temperature was in September, August and July.
Average Water Temperature by Month, °F
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Cayo Guillermo was 91.4°F. The maximum and minimum values were 90.6°F and 92.6°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Cayo Guillermo was 91.0°F. The maximum and minimum values were 89.8°F and 92.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Cayo Guillermo was 89.2°F. The maximum and minimum values were 87.6°F and 90.2°F respectively.
Cuba Resorts:
NAME
F°
| Cayo Coco |  |
+76 |
| Cayo Guillermo |  |
+82 |
| Cayo Largo | |
+74 |
| Cayo Santa Maria | |
+80 |
| Havana | |
+76 |
| Holguin | |
+78 |
| Manzanillo | |
+80 |
| Niquero |  |
+78 |
| Pinar del Rio | |
+72 |
| Playa Esmeralda | |
+82 |
| Playa Santa Lucia | |
+80 |
| Santa Maria | |
+80 |
| Santiago de Cuba | |
+78 |
| Trinidad | |
+72 |
| Varadero | |
+76 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Cayo Guillermo
Local time: 00:50
05 dec, friday
| 0300 |  |
82°F | W 16 mph |
| 0600 | |
80°F | W 15 mph |
| 0900 |  |
80°F | W 16 mph |
| 1200 |  |
80°F | W 14 mph |
| 1500 | |
80°F | W 13 mph |
| 1800 | |
78°F | W 14 mph |
| 2100 | |
78°F | W 12 mph |
06 dec, saturday
| 0000 | |
78°F | W 12 mph |