Saint Barthélemy in September: where is it warmest?
In September, Gustavia averages 32 °C by day.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rainy days |
|---|---|---|---|---|---|
| Gustavia | 40 | 32° | 29° | 8 h | 17 |
Saint Barthélemy in September: quick answers
Saint Barthélemy in September: where is it warmest?
The warmest places in September are Gustavia (32 °C).
Saint Barthélemy in September: where is the sea warmest?
The sea is warmest at Gustavia (29 °C).
Saint Barthélemy in September: where is the weather best?
No destination has really good holiday weather in September; the best scores are in Gustavia.
Saint Barthélemy month by month
Saint Barthélemy: weather & best time to visit
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences