18.12
thu
thu
Day
77°F
NW 12 mph
Precip.
0%
0%
Night
75°F
NW 9 mph
Precip.
0%
0%
19.12
fri
fri
Day
75°F
E 9 mph
Precip.
0%
0%
Night
72°F
S 13 mph
Precip.
0%
0%
20.12
sat
sat
Day
70°F
SW 14 mph
Precip.
0%
0%
Night
70°F
W 13 mph
Precip.
0%
0%
21.12
sun
sun
Day
70°F
SW 15 mph
Precip.
0%
0%
Night
73°F
SW 19 mph
Precip.
0%
0%
22.12
mon
mon
Day
73°F
SW 22 mph
Precip.
0%
0%
Night
73°F
SW 25 mph
Precip.
0%
0%
23.12
tue
tue
Day
73°F
W 22 mph
Precip.
56%
56%
Night
73°F
SW 25 mph
Precip.
20%
20%
24.12
wed
wed
Day
73°F
SW 21 mph
Precip.
0%
0%
Night
73°F
SW 25 mph
Precip.
0%
0%
25.12
thu
thu
Day
73°F
SW 22 mph
Precip.
73%
73%
Night
73°F
SW 19 mph
Precip.
100%
100%
26.12
fri
fri
Day
73°F
SW 19 mph
Precip.
0%
0%
Night
73°F
W 17 mph
Precip.
100%
100%
27.12
sat
sat
Day
73°F
SW 16 mph
Precip.
100%
100%
Night
73°F
W 19 mph
Precip.
0%
0%
28.12
sun
sun
Day
73°F
W 16 mph
Precip.
85%
85%
Night
73°F
W 17 mph
Precip.
0%
0%
29.12
mon
mon
Day
73°F
W 14 mph
Precip.
67%
67%
Night
75°F
W 14 mph
Precip.
73%
73%
30.12
tue
tue
Day
73°F
W 13 mph
Precip.
0%
0%
Night
73°F
W 16 mph
Precip.
0%
0%
31.12
wed
wed
Day
73°F
W 17 mph
Precip.
100%
100%
Night
75°F
W 18 mph
Precip.
67%
67%
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: 20:49
December 18, thursday
2100
75°F
NW
8 mph
8 mph
December 19, friday
0000
75°F
NW
9 mph
9 mph
0300
75°F
N
6 mph
6 mph
0600
75°F
NE
6 mph
6 mph
0900
75°F
E
7 mph
7 mph
1200
75°F
E
9 mph
9 mph
1500
75°F
SE
11 mph
11 mph
1800
75°F
S
12 mph
12 mph
