World Resorts USA Key West Weather

Key West Sea Temperature in January

Average sea water temperature in January:
+73.2°F
Minimum sea water temperature in January: 78.8°F
Maximum sea water temperature in January: 66.0°F

Daily sea water temperature in January, °F

Show year:
2025
2024
2023

The average sea water temperature in January of 2025 was 70.3°F. The highest and lowest sea temperatures during the month were 75.6°F and 66.0°F.

Monthly sea water temperature in Key West, °F

Which USA resorts have warmest sea in January?

Place name January 2025 January 2024
Kailua Kona 78.2°F 77.6°F
Honolulu 77.6°F 76.6°F
Hawaii 77.5°F 76.5°F
Maui 76.9°F 76.8°F
Oahu 76.5°F 75.6°F
West Palm Beach 75.5°F 76.5°F
Fort Lauderdale 75.1°F 75.9°F
Kauai 75.0°F 76.0°F
Miami Beach 73.1°F 74.8°F
Islamorada 71.3°F 74.0°F
Key Largo 71.1°F 73.8°F
Miami 70.7°F 73.1°F
Key West 70.3°F 72.7°F
Everglades 68.6°F 71.6°F
South Padre Island 66.7°F 64.8°F
Marco Island 65.2°F 67.2°F
Naples 64.7°F 66.8°F
Sanibel Island 63.7°F 65.6°F
Fort Walton Beach 61.8°F 58.9°F
Corpus Christi 61.6°F 60.3°F

Best time for vacation in Key West

Sunniest months:
May 16 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 87.2 °F
July 86.6 °F
September 86.1 °F
Coldest months:
January 72.1 °F
February 74.0 °F
December 75.4 °F
Rainiest months:
June 7 days
August 7 days
September 6 days
Windiest months:
November 14.7 mph
December 13.8 mph
January 13.8 mph

Key West on a weather map

Key West
+66°F
S 20 mph
Feels like: +66°F
Precip.: 0%
Places in USA:
Name
°F
+37°F
+75°F
+75°F
+63°F
+64°F
+73°F
+75°F
+68°F
+30°F
+79°F
+52°F
+64°F
+59°F
+55°F
+19°F
24 Hours Forecast
Key West
Local time: 15:05
December 30, tuesday
1800
66°F
S
21 mph
2100
68°F
S
19 mph
December 31, wednesday
0000
68°F
S
18 mph
0300
66°F
S
18 mph
0600
64°F
S
19 mph
0900
64°F
S
20 mph
1200
66°F
S
16 mph
1500
66°F
S
14 mph
Units of measurement: °C / °F