Port Louis weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: May – November
What is the weather like in Port Louis in September?
In September, Port Louis is warm: daytime highs average 26 °C, and even at night it stays warm at around 20 °C. The sea averages 23.7 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 12 rainy days and 36 mm in total. All in all, September is a good month for a holiday in Port Louis.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 77 | 79 | 84 |
| Day | 25° | 26° | 27° |
| Night | 20° | 20° | 21° |
| Sea | 24° | 24° | 24° |
| Sun | 7 h | 8 h | 8 h |
| Rain days | 11 | 12 | 10 |
More details for September
- Daylight
- 11 h 57 min06:07 – 18:04
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 4 daysdew point 18 °C or moreAll months
- Wind
- 28 km/haverage daily peakAll months
- Cloud cover
- 43 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+4Indian/Mauritius
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %77 %
- Few rainy daysweight 30 %45 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Rain jacket or umbrella
Port Louis in September: quick answers
Is Port Louis hot in September?
Warm rather than hot: in September, daytime highs in Port Louis average 26 °C and nights cool to about 20 °C.
Can you swim in Port Louis in September?
Yes. In September the sea averages 23.7 °C – pleasant for swimming.
Does it rain much in Port Louis in September?
Rain is frequent, with about 12 rainy days and 36 mm in total.
Port Louis month by month
The whole year in Port LouisAll destinations: MauritiusWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, 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