19.05
tue
tue
Day
84°F
W 17 mph
Precip.
0%
0%
Night
82°F
W 19 mph
Precip.
65%
65%
20.05
wed
wed
Day
82°F
W 16 mph
Precip.
74%
74%
Night
82°F
W 21 mph
Precip.
68%
68%
21.05
thu
thu
Day
82°F
W 13 mph
Precip.
83%
83%
Night
82°F
W 19 mph
Precip.
0%
0%
22.05
fri
fri
Day
81°F
W 11 mph
Precip.
83%
83%
Night
82°F
W 18 mph
Precip.
0%
0%
23.05
sat
sat
Day
82°F
W 12 mph
Precip.
78%
78%
Night
82°F
W 12 mph
Precip.
100%
100%
24.05
sun
sun
Day
82°F
W 9 mph
Precip.
0%
0%
Night
82°F
W 17 mph
Precip.
100%
100%
25.05
mon
mon
Day
82°F
W 18 mph
Precip.
100%
100%
Night
82°F
W 22 mph
Precip.
100%
100%
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 May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 84.3°F. The highest and lowest sea temperatures during the month were 86.9°F and 81.5°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 85.5°F. The highest and lowest sea temperatures during the month were 86.7°F and 83.5°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: 08:29
May 19, tuesday
0900
82°F
W
16 mph
16 mph
1200
84°F
W
17 mph
17 mph
1500
82°F
W
17 mph
17 mph
1800
82°F
W
16 mph
16 mph
2100
82°F
W
18 mph
18 mph
May 20, wednesday
0000
82°F
W
19 mph
19 mph
0300
82°F
W
19 mph
19 mph
0600
81°F
W
19 mph
19 mph
