Saint-Denis weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Excellent
Best time to visit: June – December
What is the weather like in Saint-Denis in August?
In August, Saint-Denis is warm: daytime highs average 23 °C, and nights cool down to about 19 °C. The sea averages 23.6 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 11 rainy days and 37 mm in total. All in all, August is an excellent month for a holiday in Saint-Denis.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 75 | 81 | 85 |
| Day | 23° | 23° | 24° |
| Night | 20° | 19° | 20° |
| Sea | 24° | 24° | 24° |
| Sun | 7 h | 8 h | 8 h |
| Rain days | 13 | 11 | 10 |
More details for August
- Daylight
- 11 h 23 min06:42 – 18:04
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 4 daysdew point 18 °C or moreAll months
- Wind
- 11 km/haverage daily peakAll months
- Cloud cover
- 36 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+4Indian/Reunion
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %75 %
- Few rainy daysweight 30 %54 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Rain jacket or umbrella
Saint-Denis in August: quick answers
Is Saint-Denis hot in August?
Warm rather than hot: in August, daytime highs in Saint-Denis average 23 °C and nights cool to about 19 °C.
Can you swim in Saint-Denis in August?
Yes. In August the sea averages 23.6 °C – pleasant for swimming.
Does it rain much in Saint-Denis in August?
Rain is frequent, with about 11 rainy days and 37 mm in total.
Saint-Denis month by month
The whole year in Saint-DenisAll destinations: RéunionWhere to go in AugustSea temperature in August
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