SeasonMapSantander weather in September
Spain
September in Santander: nice, rainy, with clean air — an excellent time to visit.
#5 of 12 months in Santander · #539 of 1383 destinations to visit in September · comfort 84/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Santander in September
Notes from nearby San Sebastián (149 km away)
Santander doesn't have its own notes for September yet — these are about San Sebastián, close enough to share the season.
September beats August: the sea is warmest, La Concha isn't full, and the pintxo bars in the Parte Vieja are back to locals. It rains here — Basque green isn't free — but the showers are short.
Other months in Santander
Santander's forum describes July as mild rather than hot by Spanish standards, with beautiful sunshine possible but never guaranteed on the Bay of Biscay coast. Regulars are candid that this 'Green Coast' region stays damp and humid much of the time thanks to the surrounding mountains, and that a morning drizzle turning to afternoon sun (or the reverse) is a completely normal pattern.
Add your own note from Santander's card on the map.
Santander climate normals — September
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 61°F | |
| Feels like (high) | 22°C / 72°F | |
| Sea temperature | 22°C / 72°F | 🙂 pleasant |
| Rainfall | 111 mm / 4.4 in | 🌧 rainy |
| Rainy days | 10 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 16°C / 60°F | |
| Sunshine | 10 h/day | |
| Daylight | 12.5 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Santander in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer holidays in Spain, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Santander's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherSantander's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Santander in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Galerna season
1 Jun – 30 Sep · usuallyWind seasonRiskThe Cantabrian coast's own squall: a hot, still afternoon flips inside an hour to a north-westerly gale and a ten-degree drop. Sailors here watch for it all summer.
- Season
Beach season on the Sardinero
1 Jul – 20 Sep · usuallySea warm enoughThe northern coast warms late and cools fast, so the swimming window is roughly July to mid-September. September is the better half of it and the beaches are half as full.
- Season
Autumn and winter swell
15 Sep – 31 Mar · usuallySurf seasonThe Atlantic starts sending proper groundswell in September. Somo across the bay picks it up first, and by January the storms are big enough to close the Sardinero promenade.
Nearby, and something's on
Within 300 km of Santander — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Santander?
Santander in September — FAQ
- Is September a good time to visit Santander?
- September in Santander: nice, rainy, with clean air — an excellent time to visit. It ranks #5 of 12 months for Santander on SeasonMap's comfort score (84/100).
- What is the weather like in Santander in September?
- In September, Santander averages a daily high of 21.9°C and a low of 16°C, with about 110.8 mm of rain over roughly 9.8 rainy days.
- What is the air quality in Santander in September?
- Santander has a mean US Air Quality Index of about 48 in September.
Other months in Santander
Compare Santander in September
Warmer or cooler than Santander in September
Similar destinations in Southern Europe — September
Within 300 km: Bilbao's Txakoli harvest around 5 Sep – 15 Oct, and San Sebastián's La Concha swimming season around 1 Jul – 25 Sep.