San Sebastián weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Good
Best time to visit: May – October
What is the weather like in San Sebastián in October?
In October, San Sebastián is mild: daytime highs average 19 °C, and nights cool down to about 14 °C. The sea averages 18.6 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain is frequent, with about 14 rainy days and 114 mm in total. All in all, October is a good month for a holiday in San Sebastián.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 72 | 65 | 34 |
| Day | 22° | 19° | 14° |
| Night | 16° | 14° | 10° |
| Sea | 21° | 19° | 16° |
| Sun | 6 h | 5 h | 3 h |
| Rain days | 13 | 14 | 17 |
More details for October
- Daylight
- 11 h 7 min08:20 – 19:27
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 18 km/haverage daily peak
- Cloud cover
- 62 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Madrid
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %28 %
- Few rainy daysweight 30 %32 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
San Sebastián in October: quick answers
Is San Sebastián hot in October?
No. In October, San Sebastián is mild: daytime highs average 19 °C and nights drop to about 14 °C.
Can you swim in San Sebastián in October?
Only if you don't mind cold water: in October the sea averages just 18.6 °C. Comfortable swimming is possible from July to September.
Does it rain much in San Sebastián in October?
Rain is frequent, with about 14 rainy days and 114 mm in total.
San Sebastián month by month
The whole year in San SebastiánAll destinations: SpainWhere to go in OctoberSea temperature in October
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)