Measurements:
°C
°F
Key West
74°F
S 22 mph
Feels like: 80°F
Precip: 0%
World Resorts USA Key West Weather

Key West Sea Water Temperature

Current Sea Water Temperature:
+81.8°F
Maximum Sea Water Temperature in November: 88.4°F
Minimum Sea Water Temperature in November: 76.0°F
Average water temperature in November: 82.1°F

Sea Water Temperature for the Last 10 Days:

November 21 81.8°F November 16 83.6°F
November 20 82.0°F November 15 83.8°F
November 19 82.2°F November 08 82.8°F
November 18 82.6°F November 07 82.8°F
November 17 82.4°F November 06 82.6°F

When is the Warmest Sea for Key West?

According to our data for the last three years for Key West the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2024 2023 2022

The average sea surface temperature in August 2024 for Key West was 92.0°F. The maximum and minimum values were 90.2°F and 93.6°F respectively.

Sea Water Temperature in July

Select Year: 2024 2023 2022

The average sea surface temperature in July 2024 for Key West was 91.7°F. The maximum and minimum values were 89.8°F and 93.4°F respectively.

Sea Water Temperature in September

Select Year: 2024 2023 2022

The average sea surface temperature in September 2024 for Key West was 91.6°F. The maximum and minimum values were 87.6°F and 94.0°F respectively.

Best Time to Visit Key West
The most sunny months:
March 16 days
April 16 days
May 16 days
The most warm months:
August 91.7 °F
July 91.1 °F
September 89.8 °F
Warmest sea temperature:
August 91.2 °F
July 90.6 °F
September 90.0 °F
The most cold months:
January 74.9 °F
February 76.7 °F
December 78.6 °F
The most rainy months:
August 7 days
July 7 days
September 7 days
The most windy months:
November 14 mph
December 14 mph
March 14 mph

Key West on the Weather Map

USA Resorts:
NAME
Boston +48
Chicago +34
Hawaii +80
Honolulu +80
Houston +74
Las Vegas +60
Los Angeles +74
Maui +74
Miami +86
New York +48
San Diego +64
San Francisco +58
Sarasota +76
Tampa +74
Washington +52
24 Hours Weather Forecast
Key West
Local time: 15:48
21 nov, thursday
1800 76°F
SE
23 mph
2100 72°F
S
24 mph
22 nov, friday
0000 72°F
S
22 mph
0300 72°F
S
20 mph
0600 72°F
S
21 mph
0900 72°F
S
19 mph
1200 74°F
SE
16 mph
1500 74°F
SE
19 mph