Saint-Jean-de-Luz 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
Fair
Best time to visit: July – August
What is the weather like in Saint-Jean-de-Luz in September?
In September, Saint-Jean-de-Luz is warm: daytime highs average 22 °C, and nights cool down to about 16 °C. The sea averages 21.1 °C – refreshing for a swim. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 85 mm in total. All in all, September is a so-so month for a holiday in Saint-Jean-de-Luz.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 70 | 53 | 23 |
| Day | 24° | 22° | 20° |
| Night | 18° | 16° | 13° |
| Sea | 22° | 21° | 19° |
| Sun | 7 h | 6 h | 4 h |
| Rain days | 11 | 11 | 12 |
More details for September
- Daylight
- 12 h 35 min07:45 – 20:19
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 4 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 55 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Time zone
- UTC+2Europe/Paris
How the score comes together
- Temperatureweight 35 %55 %
- Seaweight 25 %59 %
- Sunshineweight 20 %48 %
- Few rainy daysweight 20 %49 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Saint-Jean-de-Luz in September: quick answers
Is Saint-Jean-de-Luz hot in September?
Warm rather than hot: in September, daytime highs in Saint-Jean-de-Luz average 22 °C and nights cool to about 16 °C. On about 1 days the thermometer climbs to 30 °C or more.
Can you swim in Saint-Jean-de-Luz in September?
Yes. In September the sea averages 21.1 °C – refreshing for a swim.
Does it rain much in Saint-Jean-de-Luz in September?
Rain is frequent, with about 11 rainy days and 85 mm in total.
Saint-Jean-de-Luz month by month
The whole year in Saint-Jean-de-LuzAll destinations: FranceWhere 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