Average sea water temperature in October:
+83.1°F
| Minimum sea water temperature in October: | 86.9°F |
| Maximum sea water temperature in October: | 78.1°F |
Daily sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 83.8°F. The highest and lowest sea temperatures during the month were 86.4°F and 81.5°F.
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Monthly sea water temperature in Key West, °F
Which USA resorts have warmest sea in October?
| Place name | October 2025 | October 2024 |
|---|---|---|
| South Padre Island | 84.0°F | 82.4°F |
| Key West | 83.8°F | 82.9°F |
| West Palm Beach | 83.5°F | 83.3°F |
| Fort Lauderdale | 83.5°F | 83.0°F |
| Miami Beach | 83.4°F | 83.4°F |
| Islamorada | 83.1°F | 82.9°F |
| Key Largo | 83.0°F | 83.1°F |
| Miami | 82.7°F | 82.9°F |
| Everglades | 82.5°F | 82.6°F |
| Corpus Christi | 82.2°F | 80.6°F |
| Marco Island | 82.0°F | 81.9°F |
| Naples | 81.9°F | 81.6°F |
| Sanibel Island | 81.6°F | 81.3°F |
| Kauai | 81.3°F | 79.2°F |
| Cape Coral | 81.1°F | 81.2°F |
| Galveston Island | 81.1°F | 79.2°F |
| Galveston | 80.8°F | 78.8°F |
| Honolulu | 80.7°F | 80.6°F |
| Hawaii | 80.6°F | 80.5°F |
| Siesta Key | 80.4°F | 80.7°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: 02:32
December 23, tuesday
0300
75°F
W
22 mph
22 mph
0600
75°F
W
22 mph
22 mph
0900
75°F
W
21 mph
21 mph
1200
73°F
W
19 mph
19 mph
1500
75°F
W
21 mph
21 mph
1800
75°F
W
22 mph
22 mph
2100
75°F
W
20 mph
20 mph
December 24, wednesday
0000
75°F
SW
22 mph
22 mph
