27.12
sat
sat
Day
73°F
S 8 mph
Precip.
0%
0%
Night
72°F
SW 5 mph
Precip.
0%
0%
28.12
sun
sun
Day
73°F
SW 8 mph
Precip.
0%
0%
Night
72°F
W 9 mph
Precip.
0%
0%
29.12
mon
mon
Day
72°F
SW 4 mph
Precip.
0%
0%
Night
68°F
S 9 mph
Precip.
0%
0%
30.12
tue
tue
Day
70°F
S 9 mph
Precip.
0%
0%
Night
66°F
S 19 mph
Precip.
0%
0%
31.12
wed
wed
Day
63°F
S 14 mph
Precip.
0%
0%
Night
64°F
S 9 mph
Precip.
0%
0%
01.01
thu
thu
Day
66°F
S 14 mph
Precip.
0%
0%
Night
64°F
S 14 mph
Precip.
0%
0%
02.01
fri
fri
Day
64°F
SW 12 mph
Precip.
48%
48%
Night
66°F
S 9 mph
Precip.
0%
0%
sea water
temperature
temperature
| Key West |
monthly
weather
weather
| Key West |
current
weather
weather
| Key West |
14 days
forecast
forecast
| Key West |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 76.1°F. The highest and lowest sea temperatures during the month were 79.3°F and 73.6°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 70.3°F. The highest and lowest sea temperatures during the month were 75.6°F and 66.0°F.
Air temperature in Key West, °F
Precipitation total in Key West, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Key West
Key West on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Key West
Local time: 20:30
December 27, saturday
2100
72°F
S
7 mph
7 mph
December 28, sunday
0000
72°F
SW
5 mph
5 mph
0300
70°F
SW
7 mph
7 mph
0600
70°F
SW
7 mph
7 mph
0900
72°F
SW
9 mph
9 mph
1200
73°F
SW
8 mph
8 mph
1500
73°F
SW
8 mph
8 mph
1800
73°F
SW
8 mph
8 mph
