18.03
wed
wed
Day
66°F
S 19 mph
Precip.
0%
0%
Night
68°F
SW 26 mph
Precip.
100%
100%
19.03
thu
thu
Day
70°F
S 22 mph
Precip.
0%
0%
Night
72°F
SW 22 mph
Precip.
0%
0%
20.03
fri
fri
Day
72°F
S 22 mph
Precip.
0%
0%
Night
73°F
SW 16 mph
Precip.
0%
0%
21.03
sat
sat
Day
72°F
SW 12 mph
Precip.
0%
0%
Night
72°F
SW 6 mph
Precip.
0%
0%
22.03
sun
sun
Day
72°F
SW 5 mph
Precip.
0%
0%
Night
73°F
W 10 mph
Precip.
0%
0%
23.03
mon
mon
Day
73°F
W 6 mph
Precip.
0%
0%
Night
73°F
S 6 mph
Precip.
0%
0%
24.03
tue
tue
Day
72°F
S 6 mph
Precip.
0%
0%
Night
73°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 March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 77.1°F. The highest and lowest sea temperatures during the month were 79.5°F and 72.7°F.
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 78.0°F. The highest and lowest sea temperatures during the month were 80.1°F and 75.6°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: 17:22
March 18, wednesday
1800
68°F
S
24 mph
24 mph
2100
68°F
SW
26 mph
26 mph
March 19, thursday
0000
68°F
SW
26 mph
26 mph
0300
68°F
SW
23 mph
23 mph
0600
68°F
S
25 mph
25 mph
0900
70°F
S
26 mph
26 mph
1200
70°F
S
22 mph
22 mph
1500
72°F
S
21 mph
21 mph
