In September warmest sea in Caribbean Sea is usually observed in the following locations: Cayo Largo, Niquero, Key West.
Table below shows the average sea water temperature for marine resorts of Caribbean Sea in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Cayo Largo | 88.0°F | 88.1°F | 87.7°F |
| Niquero | 87.9°F | 87.7°F | 88.0°F |
| Key West | 87.8°F | 86.9°F | 87.4°F |
| Campeche | 87.7°F | 87.0°F | 87.7°F |
| Pinar del Rio | 87.7°F | 87.3°F | 87.7°F |
| Manzanillo | 87.6°F | 87.3°F | 88.2°F |
| Cienfuegos | 87.5°F | 87.4°F | 87.3°F |
| Chetumal | 87.5°F | 86.8°F | 87.6°F |
| George Town | 87.4°F | 87.4°F | 86.9°F |
| Grand Cayman | 87.4°F | 87.4°F | 86.9°F |
| Carrefour | 87.4°F | 86.9°F | 87.5°F |
| Port au Prince | 87.4°F | 86.8°F | 87.5°F |
| Trinidad | 87.2°F | 87.4°F | 87.3°F |
| Key Largo | 87.2°F | 86.6°F | 87.1°F |
| Belize | 87.0°F | 86.6°F | 87.3°F |
| Little Cayman | 87.0°F | 87.5°F | 87.4°F |
| Cayman Brac | 86.9°F | 87.6°F | 87.3°F |
| San Pedro | 86.9°F | 86.7°F | 87.4°F |
| Cayo Coco | 86.9°F | 87.4°F | 87.3°F |
| Islamorada | 86.9°F | 86.7°F | 87.3°F |
| Santiago de Cuba | 86.9°F | 86.6°F | 87.0°F |
| Varadero | 86.9°F | 86.6°F | 86.8°F |
| Puerto Barrios | 86.9°F | 86.4°F | 87.8°F |
| Cayo Guillermo | 86.8°F | 87.3°F | 87.2°F |
| Havana | 86.8°F | 86.1°F | 86.2°F |
| San Pedro Sula | 86.8°F | 86.5°F | 88.0°F |
| Ambergis Caye | 86.8°F | 86.6°F | 87.3°F |
| New Providence | 86.7°F | 86.0°F | 86.1°F |
| Eleuthera | 86.7°F | 86.0°F | 86.0°F |
| Cayo Santa Maria | 86.7°F | 87.1°F | 86.9°F |
| Nassau | 86.7°F | 86.0°F | 86.1°F |
| Santa Maria | 86.7°F | 87.1°F | 87.0°F |
| Livingston | 86.5°F | 86.6°F | 88.1°F |
| Tela | 86.4°F | 87.0°F | 88.2°F |
| Andros | 86.4°F | 86.0°F | 86.0°F |
| Puerto Cortes | 86.4°F | 86.7°F | 88.1°F |
| Cap Haitien | 86.4°F | 86.4°F | 86.7°F |
| Westmoreland | 86.3°F | 87.1°F | 86.9°F |
| Placencia | 86.3°F | 86.4°F | 88.0°F |
| Providenciales | 86.3°F | 86.5°F | 86.5°F |
| Punta Gorda | 86.2°F | 86.3°F | 87.7°F |
| Montego Bay | 86.2°F | 86.7°F | 86.7°F |
| Negril | 86.1°F | 87.1°F | 87.1°F |
| Cozumel | 86.1°F | 85.9°F | 86.5°F |
| La Ceiba | 86.1°F | 87.1°F | 87.9°F |
| Puerto Morelos | 86.1°F | 85.6°F | 86.4°F |
| Mahahual | 86.1°F | 86.0°F | 86.7°F |
| Playa del Carmen | 86.0°F | 85.8°F | 86.5°F |
| Samana | 86.0°F | 85.9°F | 86.1°F |
| Playa Santa Lucia | 86.0°F | 86.5°F | 86.3°F |
| Puerto Aventuras | 86.0°F | 85.7°F | 86.4°F |
| Merida | 86.0°F | 84.5°F | 85.6°F |
| Runaway Bay | 86.0°F | 86.5°F | 86.8°F |
| Riviera Maya | 86.0°F | 85.7°F | 86.4°F |
| Matanzas | 85.9°F | 85.8°F | 85.7°F |
| Salt Cay | 85.9°F | 85.6°F | 85.9°F |
| Grand Turk | 85.9°F | 85.7°F | 85.9°F |
| Cockburn | 85.9°F | 85.7°F | 85.9°F |
| Tulum | 85.9°F | 85.6°F | 86.4°F |
| Ponce | 85.9°F | 86.3°F | 87.0°F |
| Mayaguez | 85.8°F | 86.1°F | 86.8°F |
| Guanaja | 85.8°F | 85.6°F | 86.9°F |
| Baracoa | 85.7°F | 85.8°F | 85.8°F |
| Port Antonio | 85.7°F | 86.4°F | 86.6°F |
| Ocho Rios | 85.7°F | 86.4°F | 86.5°F |
| West End | 85.7°F | 86.0°F | 87.1°F |
| Sandy Bay | 85.7°F | 86.0°F | 87.1°F |
| Los Cayitos | 85.7°F | 86.2°F | 87.1°F |
| Cancun | 85.7°F | 85.0°F | 86.0°F |
| Coxen Hole | 85.7°F | 86.0°F | 87.0°F |
| Roatan | 85.7°F | 85.9°F | 87.0°F |
| West Bay | 85.7°F | 86.0°F | 87.1°F |
| La Romana | 85.6°F | 85.7°F | 85.9°F |
| San Pedro De Macoris | 85.6°F | 85.8°F | 85.9°F |
| Utila | 85.6°F | 86.1°F | 87.0°F |
| Aguadilla | 85.6°F | 86.1°F | 86.6°F |
| Trujillo | 85.6°F | 86.3°F | 87.3°F |
| Bocha Chica | 85.6°F | 85.8°F | 85.9°F |
| Arecibo | 85.6°F | 85.8°F | 86.3°F |
| Santo Domingo | 85.6°F | 85.9°F | 85.9°F |
| Kingston | 85.6°F | 86.2°F | 86.5°F |
| Juan Dolio | 85.6°F | 85.8°F | 86.0°F |
| Pointe-a-Pitre | 85.6°F | 85.9°F | 86.6°F |
| Isabella | 85.6°F | 85.9°F | 86.4°F |
| San Juan | 85.4°F | 85.7°F | 86.4°F |
| Holguin | 85.4°F | 86.0°F | 85.8°F |
| Playa Blanca | 85.4°F | 86.0°F | 85.9°F |
| Playa Esmeralda | 85.3°F | 86.1°F | 85.9°F |
| Basse-Terre | 85.3°F | 85.7°F | 86.4°F |
| Philipsburg | 85.2°F | 85.7°F | 86.3°F |
| Barbuda | 85.2°F | 85.4°F | 86.3°F |
| Arena Gorda | 85.1°F | 84.9°F | 85.5°F |
| Punta Cana | 85.1°F | 85.3°F | 85.7°F |
| Cap Cana | 85.1°F | 85.3°F | 85.7°F |
| Playa Bavaro | 85.1°F | 84.9°F | 85.6°F |
| St John's | 85.1°F | 85.4°F | 86.3°F |
| Maimon Bay | 85.1°F | 85.1°F | 84.8°F |
| Puerto Plata | 85.0°F | 85.0°F | 84.7°F |
| Sosua | 85.0°F | 85.0°F | 84.8°F |
| Isla Mujeres | 85.0°F | 84.7°F | 85.7°F |
| Antigua | 85.0°F | 85.3°F | 86.2°F |
Charts below show average sea water temperature for Caribbean Sea resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of Caribbean Sea resorts at that time.
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