World Resorts USA Key West Weather

Key West sea water temperature

Current sea water temperature:
+78.6°F
Minimum sea water temperature in November: 84.6°F
Maximum sea water temperature in November: 73.4°F
Average sea water temperature in November: 78.9°F

Sea water temperature for the last 10 days:

November 21 78.6°F November 16 80.2°F
November 20 78.8°F November 15 80.4°F
November 19 79.0°F November 8 79.5°F
November 18 79.3°F November 7 79.5°F
November 17 79.2°F November 6 79.3°F

When is the warmest sea in Key West?

Based on the data about daily sea water temperature for the last three years the warmest sea in Key West was noticed in August, July and September.

Monthly Sea Temperatures in Key West, °F

Sea water temperature in August, °F

Show year:
2024
2023
2022

The average sea water temperature in August of 2024 was 87.8°F. The highest and lowest sea temperatures during the month were 89.2°F and 86.2°F.

Sea water temperature in July, °F

Show year:
2024
2023
2022

The average sea water temperature in July of 2024 was 87.6°F. The highest and lowest sea temperatures during the month were 89.1°F and 85.8°F.

Sea water temperature in September, °F

Show year:
2024
2023
2022

The average sea water temperature in September of 2024 was 87.4°F. The highest and lowest sea temperatures during the month were 89.6°F and 83.8°F.

Best time for vacation in Key West

Sunniest months:
March 16 days
April 16 days
May 16 days
Warmest months:
August 87.5 °F
July 87.0 °F
September 85.8 °F
Warmest sea temp:
August 87.0 °F
July 86.5 °F
September 86.0 °F
Coldest months:
January 72.4 °F
February 74.0 °F
December 75.7 °F
Rainiest months:
August 7 days
July 7 days
September 7 days
Windiest months:
November 14.6 mph
December 13.7 mph
March 13.7 mph

Key West on a weather map

Key West
+73°F
S 24 mph
Feels like: +77°F
Precip.: 0%
Places in USA:
Name
°F
+46°F
+43°F
+73°F
+73°F
+41°F
+55°F
+73°F
+64°F
+48°F
+50°F
+55°F
+64°F
+61°F
+54°F
+32°F
24 Hours Forecast
Key West
Local time: 09:20
November 21, thursday
1200
73°F
S
21 mph
1500
73°F
S
22 mph
1800
72°F
SE
23 mph
2100
72°F
S
24 mph
November 22, friday
0000
70°F
S
22 mph
0300
70°F
S
19 mph
0600
70°F
S
21 mph
0900
70°F
S
19 mph
Units of measurement: °C / °F