18.12
thu
thu
Day
75°F
W 17 mph
Precip.
0%
0%
Night
75°F
NW 8 mph
Precip.
0%
0%
19.12
fri
fri
Day
75°F
SE 6 mph
Precip.
0%
0%
Night
72°F
S 11 mph
Precip.
0%
0%
20.12
sat
sat
Day
72°F
SW 11 mph
Precip.
0%
0%
Night
73°F
W 9 mph
Precip.
63%
63%
21.12
sun
sun
Day
73°F
SW 14 mph
Precip.
0%
0%
Night
73°F
SW 19 mph
Precip.
0%
0%
22.12
mon
mon
Day
73°F
SW 20 mph
Precip.
0%
0%
Night
73°F
SW 22 mph
Precip.
0%
0%
23.12
tue
tue
Day
73°F
SW 24 mph
Precip.
0%
0%
Night
73°F
SW 25 mph
Precip.
41%
41%
24.12
wed
wed
Day
73°F
W 21 mph
Precip.
0%
0%
Night
73°F
W 21 mph
Precip.
0%
0%
25.12
thu
thu
Day
73°F
W 14 mph
Precip.
0%
0%
Night
73°F
W 14 mph
Precip.
0%
0%
26.12
fri
fri
Day
72°F
SW 16 mph
Precip.
0%
0%
Night
73°F
W 15 mph
Precip.
0%
0%
27.12
sat
sat
Day
72°F
SW 12 mph
Precip.
0%
0%
Night
73°F
W 14 mph
Precip.
0%
0%
28.12
sun
sun
Day
72°F
W 14 mph
Precip.
0%
0%
Night
73°F
W 14 mph
Precip.
23%
23%
29.12
mon
mon
Day
73°F
W 16 mph
Precip.
100%
100%
Night
73°F
W 19 mph
Precip.
100%
100%
30.12
tue
tue
Day
75°F
NW 15 mph
Precip.
28%
28%
Night
75°F
NW 14 mph
Precip.
100%
100%
31.12
wed
wed
Day
75°F
NW 12 mph
Precip.
100%
100%
Night
75°F
SW 11 mph
Precip.
100%
100%
sea water
temperature
temperature
| Key West |
monthly
weather
weather
| Key West |
current
weather
weather
| Key West |
7 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 76.7°F. The highest and lowest sea temperatures during the month were 79.3°F and 74.1°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: 03:20
December 18, thursday
0600
73°F
W
18 mph
18 mph
0900
75°F
W
17 mph
17 mph
1200
75°F
W
17 mph
17 mph
1500
75°F
NW
14 mph
14 mph
1800
75°F
NW
11 mph
11 mph
2100
75°F
W
10 mph
10 mph
December 19, friday
0000
75°F
NW
8 mph
8 mph
0300
75°F
N
6 mph
6 mph
