Current sea water temperature:
+80.2°F
| Minimum sea water temperature in October: | 86.9°F |
| Maximum sea water temperature in October: | 78.1°F |
| Average sea water temperature in October: | 83.2°F |
| more information | |
14 days
forecast
forecast
| Key West |
monthly
weather
weather
| Key West |
Sea water temperature for the last 10 days:
| October 24 | 80.2°F | October 19 | 84.0°F |
| October 23 | 80.6°F | October 18 | 85.8°F |
| October 22 | 81.9°F | October 17 | 85.3°F |
| October 21 | 83.1°F | October 16 | 85.8°F |
| October 20 | 83.7°F | October 15 | 85.8°F |
Monthly sea water temperature, °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:
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 July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 88.5°F. The highest and lowest sea temperatures during the month were 90.0°F and 87.4°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 87.8°F. The highest and lowest sea temperatures during the month were 89.4°F and 85.8°F.
current
weather
weather
| Key West |
weather in
October
October
| Key West |
Best time for vacation in Key West
Key West on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Key West
Local time: 00:16
October 25, sunday
0300
77°F
SW
19 mph
19 mph
0600
77°F
S
17 mph
17 mph
0900
77°F
S
17 mph
17 mph
1200
77°F
SW
16 mph
16 mph
1500
77°F
SW
13 mph
13 mph
1800
79°F
SW
15 mph
15 mph
2100
79°F
SW
25 mph
25 mph
October 26, monday
0000
77°F
SW
24 mph
24 mph
