09.15
tue
tue
DAY
88°F
W 9 mph
precip
18%
18%
NIGHT
90°F
W 19 mph
precip
16%
16%
09.16
wed
wed
DAY
90°F
W 16 mph
precip
16%
16%
NIGHT
90°F
W 19 mph
precip
26%
26%
09.17
thu
thu
DAY
90°F
W 12 mph
precip
24%
24%
NIGHT
90°F
W 17 mph
precip
15%
15%
09.18
fri
fri
DAY
84°F
N 13 mph
precip
78%
78%
NIGHT
88°F
W 15 mph
precip
17%
17%
09.19
sat
sat
DAY
88°F
NW 4 mph
precip
22%
22%
NIGHT
88°F
NW 8 mph
precip
18%
18%
09.20
sun
sun
DAY
88°F
N 4 mph
precip
18%
18%
NIGHT
88°F
NW 6 mph
precip
7%
7%
09.21
mon
mon
DAY
88°F
N 3 mph
precip
16%
16%
NIGHT
90°F
W 9 mph
precip
12%
12%
09.22
tue
tue
DAY
90°F
NW 7 mph
precip
8%
8%
NIGHT
90°F
W 13 mph
precip
56%
56%
09.23
wed
wed
DAY
88°F
N 6 mph
precip
37%
37%
NIGHT
88°F
SW 13 mph
precip
21%
21%
09.24
thu
thu
DAY
86°F
E 2 mph
precip
49%
49%
NIGHT
88°F
SW 12 mph
precip
34%
34%
09.25
fri
fri
DAY
86°F
SW 9 mph
precip
57%
57%
NIGHT
88°F
W 8 mph
precip
58%
58%
09.26
sat
sat
DAY
86°F
W 14 mph
precip
18%
18%
NIGHT
86°F
W 8 mph
precip
17%
17%
09.27
sun
sun
DAY
84°F
W 8 mph
precip
68%
68%
NIGHT
88°F
NW 6 mph
precip
16%
16%
09.28
mon
mon
DAY
86°F
NW 3 mph
precip
28%
28%
NIGHT
88°F
SW 12 mph
precip
24%
24%
Sea water
temperature
temperature
| Key West |
Weather in
September
September
| Key West |
7 day weather
forecast
forecast
| Key West |
10 day weather
forecast
forecast
| Key West |
14 day weather
forecast
forecast
| Key West |
Monthly weather
averages
averages
| Key West |
Current Weather
Conditions
Conditions
| Key West |
When is the Best
Time to Visit?
Time to Visit?
| Key West |
Key West Sea Water Temperature in September, °F
The average sea surface temperature in September 2026 for Key West was 93.0°F. The maximum and minimum values were 92.0°F and 93.8°F respectively.
Key West on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+62 |
| Chicago |  |
+66 |
| Hawaii |  |
+80 |
| Las Vegas | |
+80 |
| Los Angeles | |
+72 |
| Maui |  |
+66 |
| Miami |  |
+88 |
| Myrtle Beach | |
+78 |
| New York | |
+66 |
| Panama City Beach | |
+90 |
| San Diego | |
+70 |
| San Francisco |  |
+60 |
| Santa Monica | |
+70 |
| Sarasota | |
+86 |
| Washington | |
+66 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Key West
Local time: 10:27
15 sep, tuesday
| 1200 | |
88°F | W 9 mph |
| 1500 | |
90°F | W 9 mph |
| 1800 | |
90°F | W 14 mph |
| 2100 | |
90°F | W 17 mph |
16 sep, wednesday
| 0000 | |
90°F | W 19 mph |
| 0300 | |
90°F | W 19 mph |
| 0600 | |
90°F | W 17 mph |
| 0900 | |
90°F | W 17 mph |