Santander 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 – October
What is the weather like in Santander in September?
In September, Santander is warm: daytime highs average 22 °C, and nights cool down to about 16 °C. The sea averages 20.7 °C – refreshing for a swim. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 81 mm in total. All in all, September is a good month for a holiday in Santander.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 77 | 73 | 67 |
| Day | 24° | 22° | 20° |
| Night | 18° | 16° | 14° |
| Sea | 22° | 21° | 19° |
| Sun | 6 h | 6 h | 5 h |
| Rain days | 11 | 11 | 13 |
More details for September
- Daylight
- 12 h 35 min07:53 – 20:28
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 3 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 58 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Time zone
- UTC+2Europe/Madrid
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 30 %47 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Rain jacket or umbrella
Santander in September: quick answers
Is Santander hot in September?
Warm rather than hot: in September, daytime highs in Santander average 22 °C and nights cool to about 16 °C.
Can you swim in Santander in September?
Yes. In September the sea averages 20.7 °C – refreshing for a swim.
Does it rain much in Santander in September?
Rain is frequent, with about 11 rainy days and 81 mm in total.
Santander month by month
The whole year in SantanderAll destinations: SpainWhere 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