Where is the sea warmest in the Caribbean in September?
In September the warmest sea in the Caribbean is at Manzanillo, Cuba, at 30.9°C. Every one of the 191 cities measured here is comfortable this month.
| # | City | Country | Sea | Swimming |
|---|---|---|---|---|
| 1 | Manzanillo | Cuba | 30.9°C | Bath-like |
| 2 | Port-au-Prince | Haiti | 30.8°C | Bath-like |
| 3 | Nueva Gerona | Cuba | 30.8°C | Bath-like |
| 4 | Léogâne | Haiti | 30.7°C | Bath-like |
| 5 | Gonaïves | Haiti | 30.7°C | Bath-like |
| 6 | Saint-Marc | Haiti | 30.7°C | Bath-like |
| 7 | Arcahaie | Haiti | 30.7°C | Bath-like |
| 8 | Tigwav | Haiti | 30.7°C | Bath-like |
| 9 | Anse à Galets | Haiti | 30.7°C | Bath-like |
| 10 | Amapala | Honduras | 30.6°C | Bath-like |
| 11 | Pilón | Cuba | 30.5°C | Bath-like |
| 12 | Los Puertos de Altagracia | Venezuela | 30.5°C | Bath-like |
| 13 | Santa Cruz de Mara | Venezuela | 30.5°C | Bath-like |
| 14 | San Rafael | Venezuela | 30.5°C | Bath-like |
| 15 | La Unión | El Salvador | 30.5°C | Bath-like |
| 16 | Puerto Cortez | Honduras | 30.5°C | Bath-like |
| 17 | La Ceiba | Honduras | 30.4°C | Bath-like |
| 18 | Trinidad | Cuba | 30.4°C | Bath-like |
| 19 | Santiago de Tolú | Colombia | 30.4°C | Bath-like |
| 20 | Santiago de Cuba | Cuba | 30.4°C | Bath-like |
| 21 | Trujillo | Honduras | 30.4°C | Bath-like |
| 22 | Jérémie | Haiti | 30.4°C | Bath-like |
| 23 | Key West | United States | 30.4°C | Bath-like |
| 24 | Puerto Lempira | Honduras | 30.3°C | Bath-like |
| 25 | Negril | Jamaica | 30.3°C | Bath-like |
Ranked on the NOAA OISST monthly climatology — a long-run average for September, not a forecast. A given September will run warmer or cooler than this, and the sea is warmest late in the afternoon and late in the season.