World Resorts USA Key West Weather

Key West 14 Days Forecast

30.08
sun
Day
86°F
NW 13 mph
Precip.
7%
Night
86°F
W 13 mph
Precip.
7%
31.08
mon
Day
86°F
W 9 mph
Precip.
12%
Night
86°F
W 13 mph
Precip.
49%
01.09
tue
Day
86°F
NW 11 mph
Precip.
21%
Night
86°F
W 16 mph
Precip.
7%
02.09
wed
Day
86°F
W 9 mph
Precip.
22%
Night
86°F
W 17 mph
Precip.
18%
03.09
thu
Day
86°F
W 7 mph
Precip.
52%
Night
86°F
NW 17 mph
Precip.
26%
04.09
fri
Day
84°F
W 19 mph
Precip.
18%
Night
86°F
NW 17 mph
Precip.
28%
05.09
sat
Day
86°F
NW 11 mph
Precip.
18%
Night
84°F
NW 9 mph
Precip.
62%
06.09
sun
Day
86°F
N 8 mph
Precip.
14%
Night
86°F
W 7 mph
Precip.
6%
07.09
mon
Day
86°F
NW 5 mph
Precip.
15%
Night
86°F
W 7 mph
Precip.
6%
08.09
tue
Day
86°F
NW 6 mph
Precip.
6%
Night
86°F
NW 7 mph
Precip.
7%
09.09
wed
Day
86°F
NW 8 mph
Precip.
12%
Night
86°F
W 11 mph
Precip.
6%
10.09
thu
Day
86°F
NW 11 mph
Precip.
11%
Night
86°F
W 7 mph
Precip.
17%
11.09
fri
Day
86°F
W 7 mph
Precip.
5%
Night
86°F
W 8 mph
Precip.
14%
12.09
sat
Day
86°F
W 9 mph
Precip.
7%
Night
86°F
W 12 mph
Precip.
13%

Sea water temperature in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 88.8°F. The highest and lowest sea temperatures during the month were 90.5°F and 87.1°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 86.9°F. The highest and lowest sea temperatures during the month were 89.2°F and 85.3°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
04:04
Key West
+86°F
NW 16 mph
Feels like: +97°F
Precip.: 60%
Places in USA:
Name
°F
Boston
+59°F
Washington
+70°F
Hawaii
+77°F
Las Vegas
+88°F
Los Angeles
+72°F
Miami
+79°F
Maui
+61°F
Myrtle Beach
+75°F
New York
+64°F
San Diego
+72°F
San Francisco
+57°F
Santa Monica
+70°F
Sarasota
+75°F
Houston
+79°F
Chicago
+72°F
all places
24 Hours Forecast
Key West
Local time: 04:04
August 30, sunday
0600
84°F
NW
16 mph
0900
86°F
NW
14 mph
1200
86°F
NW
13 mph
1500
86°F
W
11 mph
1800
86°F
W
10 mph
2100
86°F
W
11 mph
August 31, monday
0000
86°F
W
13 mph
0300
86°F
W
12 mph
Units of measurement: °C / °F