Caribbean weather in September
In September, the Caribbean averages 30 to 32°C by day across Barbados, Antigua, St Lucia, Jamaica, Punta Cana, Aruba, Cuba (Varadero) and the Bahamas. Aruba is the warmest at 32°C, Punta Cana the coolest at 30°C. The sea is 29 to 31°C.
Caribbean in September, place by place
Warmest first. Anywhere at 24°C or more is proper beach weather. Tap a place for its full September detail.
| Destination | Day | Night | Sea | Rain | Flight |
|---|---|---|---|---|---|
| ArubaAruba | 32°C | 28°C | 29°C | 40 mm | 9½h |
| Jamaica (Montego Bay)Jamaicawet season | 32°C | 25°C | 31°C | 163 mm | 9½h |
| VaraderoCubawet season | 31°C | 26°C | 31°C | 162 mm | 9h |
| NassauBahamas | 30°C | 27°C | 30°C | 118 mm | 8½h |
| BarbadosBarbados | 30°C | 26°C | 30°C | 114 mm | 8½h |
| AntiguaAntigua and Barbuda | 30°C | 26°C | 30°C | 114 mm | 8h |
| St LuciaSt Lucia | 30°C | 26°C | 30°C | 109 mm | 8½h |
| Punta CanaDominican Republicwet season | 30°C | 26°C | 30°C | 165 mm | 8½h |
Heading to the Caribbean in September?
Share the places you've saved on TikTok and Instagram for the Caribbean to Dream Trip. It pins them on a map and builds your days around them.
Caribbean in September: quick answers
Is the Caribbean hot in September?
In September, the Caribbean averages 30 to 32°C by day across Barbados, Antigua, St Lucia, Jamaica, Punta Cana, Aruba, Cuba (Varadero) and the Bahamas. Aruba is the warmest at 32°C, Punta Cana the coolest at 30°C. The sea is 29 to 31°C. September is hot in Aruba: proper beach weather.
Where is warmest in the Caribbean in September?
Aruba, at an average high of 32°C. The driest is Aruba, with about 40 mm of rain.
Can you swim in the sea in the Caribbean in September?
Yes: Varadero (31°C), Jamaica (31°C), Nassau (30°C), Antigua (30°C), St Lucia (30°C), Barbados (30°C), Punta Cana (30°C), Aruba (29°C) have sea temperatures of 21°C or more, comfortable without a wetsuit.
How we measured this
Caribbean here means Barbados, Antigua, St Lucia, Jamaica, Punta Cana, Aruba, Cuba (Varadero) and the Bahamas: the places we measure. Figures are averages of every day from 2016 to 2025 from the Open-Meteo historical weather archive (ECMWF ERA5); sea temperatures are 2023 to 2025 averages. Rain is the average monthly total, and 150 mm or more counts as rainy season.
Planning the Caribbean in September?
Save the places you find on TikTok and Instagram for the Caribbean to one map, and Dream Trip turns them into a day-by-day plan.
