San Sebastián weather in September
Mild and comfortable, with some rainy days. Average highs of 23°C and lows of 16°C, with around 12 rainy days expected throughout the month.
While September isn't our top-rated month for San Sebastián, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
23°C
Average low
16°C
Rainy days
12 days
Best months to visit
August
What to do in San Sebastián in September
Whatever the weather, San Sebastián rewards curious visitors. Here are some of the best ways to spend your time:
Pintxo-hop at bar after bar in the old town
Hike to Monte Igueldo or Monte Ulia for bay views
Beach at La Concha or Zurriola
Visit the Aquarium or Museum of Basque Culture
Dine at Michelin-starred restaurants or casual cider houses
Browse the bustling Saturday market
What to pack for September
Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.
Browse other months
January
12C
Cool, with regular rainfall.
February
13C
Cool, with regular rainfall.
March
15C
Cool, with regular rainfall.
April
17C
Cool, with some rainy days.
May
19C
Mild and comfortable, with regular rainfall.
June
22C
Mild and comfortable, with some rainy days.
July
23C
Mild and comfortable, with some rainy days.
Recommended
August
24C
Mild and comfortable, with some rainy days.
September (you are here)
23C
Mild and comfortable, with some rainy days.
October
20C
Mild and comfortable, with some rainy days.
November
15C
Cool, with regular rainfall.
December
14C
Cool, with some rainy days.
Book your September trip to San Sebastián
Find hotels, tours and experiences for the perfect escape.
