Average sea water temperature in September:
+86.2°F
| Minimum sea water temperature in September: | 89.6°F |
| Maximum sea water temperature in September: | 82.8°F |
Daily 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.
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Monthly sea water temperature in Key West, °F
Which USA resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Key West | 87.8°F | 86.9°F |
| Key Largo | 87.2°F | 86.6°F |
| Naples | 87.0°F | 86.1°F |
| Galveston | 87.0°F | 85.5°F |
| Siesta Key | 86.9°F | 84.9°F |
| Houston | 86.9°F | 84.9°F |
| Corpus Christi | 86.8°F | 85.8°F |
| Sarasota | 86.8°F | 84.8°F |
| West Palm Beach | 86.6°F | 86.2°F |
| Fort Lauderdale | 86.6°F | 86.4°F |
| New Orleans | 86.4°F | 84.3°F |
| Cape Coral | 86.3°F | 85.2°F |
| Orange Beach | 86.0°F | 84.0°F |
| Pensacola Beach | 85.9°F | 83.9°F |
| Tampa | 85.9°F | 84.3°F |
| Clearwater Beach | 85.9°F | 84.0°F |
| Miami Beach | 85.8°F | 86.1°F |
| Panama City Beach | 85.8°F | 83.4°F |
| Fort Walton Beach | 85.7°F | 83.3°F |
| Pensacola | 85.7°F | 83.9°F |
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: 00:50
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
