World Resorts USA Key West Weather

Key West 14 Days Forecast

19.09
sat
Day
84°F
W 8 mph
Precip.
23%
Night
84°F
W 11 mph
Precip.
23%
20.09
sun
Day
84°F
N 6 mph
Precip.
4%
Night
84°F
NW 9 mph
Precip.
37%
21.09
mon
Day
84°F
N 4 mph
Precip.
5%
Night
84°F
NW 11 mph
Precip.
16%
22.09
tue
Day
84°F
SW 4 mph
Precip.
7%
Night
84°F
NW 5 mph
Precip.
16%
23.09
wed
Day
82°F
NW 6 mph
Precip.
20%
Night
82°F
W 17 mph
Precip.
44%
24.09
thu
Day
82°F
NW 14 mph
Precip.
51%
Night
82°F
NW 12 mph
Precip.
7%
25.09
fri
Day
82°F
SW 6 mph
Precip.
23%
Night
84°F
W 9 mph
Precip.
8%
26.09
sat
Day
84°F
SW 6 mph
Precip.
13%
Night
82°F
W 7 mph
Precip.
38%
27.09
sun
Day
82°F
S 5 mph
Precip.
17%
Night
82°F
SW 6 mph
Precip.
7%
28.09
mon
Day
82°F
NE 4 mph
Precip.
10%
Night
82°F
W 4 mph
Precip.
10%
29.09
tue
Day
82°F
NW 2 mph
Precip.
16%
Night
82°F
W 11 mph
Precip.
18%
30.09
wed
Day
84°F
NW 7 mph
Precip.
42%
Night
82°F
W 11 mph
Precip.
63%
01.10
thu
Day
84°F
W 11 mph
Precip.
15%
Night
84°F
W 17 mph
Precip.
9%
02.10
fri
Day
84°F
W 12 mph
Precip.
16%
Night
84°F
W 13 mph
Precip.
22%

Sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 88.5°F. The highest and lowest sea temperatures during the month were 89.4°F and 87.1°F.

Sea water temperature in October, °F

Show year:
2025
2024
2023

The average sea water temperature in October of 2025 was 83.8°F. The highest and lowest sea temperatures during the month were 86.4°F and 81.5°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

Sunniest months:
May 17 days
March 16 days
April 16 days
Warmest months:
August 87.4 °F
July 86.9 °F
September 85.8 °F
Warmest sea temp:
August 87.3 °F
July 86.7 °F
September 86.1 °F
Coldest months:
January 72.0 °F
February 73.7 °F
December 75.4 °F
Rainiest months:
June 7 days
August 7 days
September 6 days
Windiest months:
November 14.7 mph
December 13.9 mph
January 13.8 mph

Key West on a weather map

Current weather
05:17
Key West
+84°F
W 7 mph
Feels like: +91°F
Precip.: 19%
Places in USA:
Name
°F
Boston
+55°F
Washington
+64°F
Hawaii
+79°F
Las Vegas
+75°F
Los Angeles
+70°F
Miami
+81°F
Maui
+63°F
New York
+63°F
Panama City Beach
+79°F
San Diego
+68°F
San Francisco
+59°F
Santa Monica
+68°F
Sarasota
+73°F
Houston
+81°F
Chicago
+64°F
all places
24 Hours Forecast
Key West
Local time: 05:17
September 19, saturday
0600
84°F
W
7 mph
0900
84°F
SW
8 mph
1200
84°F
W
8 mph
1500
84°F
SW
7 mph
1800
82°F
SW
6 mph
2100
84°F
SW
12 mph
September 20, sunday
0000
84°F
W
11 mph
0300
84°F
NW
7 mph
Units of measurement: °C / °F