Where is the sea warmest in North America in October?
In October the warmest sea in North America is at Puerto Vallarta, Mexico, at 30.3°C. 54 of 103 cities measured are comfortable this month.
| # | City | Country | Sea | Swimming |
|---|---|---|---|---|
| 1 | Puerto Vallarta | Mexico | 30.3°C | Bath-like |
| 2 | Mazatlán | Mexico | 30.2°C | Bath-like |
| 3 | La Cruz | Mexico | 30.1°C | Bath-like |
| 4 | Acapulco de Juárez | Mexico | 29.8°C | Bath-like |
| 5 | Manzanillo | Mexico | 29.8°C | Bath-like |
| 6 | Chetumal | Mexico | 29.8°C | Bath-like |
| 7 | Ciudad del Carmen | Mexico | 29.7°C | Bath-like |
| 8 | Playa del Carmen | Mexico | 29.7°C | Bath-like |
| 9 | Cancún | Mexico | 29.5°C | Bath-like |
| 10 | Campeche | Mexico | 29.5°C | Bath-like |
| 11 | Veracruz | Mexico | 29.0°C | Bath-like |
| 12 | Cabo San Lucas | Mexico | 29.0°C | Bath-like |
| 13 | Coatzacoalcos | Mexico | 29.0°C | Bath-like |
| 14 | West Palm Beach | United States | 29.0°C | Bath-like |
| 15 | Salina Cruz | Mexico | 29.0°C | Bath-like |
| 16 | Key West | United States | 28.9°C | Bath-like |
| 17 | Pompano Beach | United States | 28.8°C | Bath-like |
| 18 | Miami | United States | 28.8°C | Bath-like |
| 19 | Hollywood | United States | 28.8°C | Bath-like |
| 20 | San Felipe | Mexico | 28.3°C | Bath-like |
| 21 | Naples | United States | 27.9°C | Bath-like |
| 22 | Cape Coral | United States | 27.7°C | Bath-like |
| 23 | Melbourne | United States | 27.3°C | Bath-like |
| 24 | Waipahu | United States | 27.2°C | Bath-like |
| 25 | Bradenton | United States | 27.2°C | Bath-like |
Ranked on the NOAA OISST monthly climatology — a long-run average for October, not a forecast. A given October will run warmer or cooler than this, and the sea is warmest late in the afternoon and late in the season.