Monthly weather overview

iconSan Sebastian monthly weather overview Spain · 산세바스티안

A quick, year-round overview of monthly and seasonal weather in San Sebastian. Use this page to get a feel for which months and seasons match your travel style.

San Sebastián weather at a glance

  • San Sebastián (Donostia) sits on the Basque coast with strong Atlantic influence, so **rain, wind, and humidity** often drive how it feels. Temperatures can look mild, yet wet air can feel surprisingly cool.
  • Summer is usually warm rather than scorching, with many evenings turning noticeably cooler. Spring and fall can switch quickly from bright to overcast.
  • Autumn to winter (roughly Oct–Mar) is commonly wet, including long drizzle days. A hooded waterproof jacket often beats an umbrella alone.
  • Along La Concha beach and the harbor, wind exposure can make evenings feel a step cooler than the numbers suggest.
  • For packing, “wet day vs dry day” is often a better decision tool than a single seasonal label.
Dec · Jan · Feb

Winter (very wet + breezy): damp-cool comfort is the default

Avg low 6–8°C / high 11–13°C · Rainy days: 12–18 / ~120–200 mm

  • Frequent drizzle/rain makes it easy to get wet while walking.
  • Wind can drop perceived temperature quickly.
  • Short daylight often makes evenings feel colder.

Suggested outfits

  • · Hooded waterproof jacket/coat
  • · Layers + light warmth
  • · Water-resistant shoes with grip option

A note for travelers

In winter, ‘staying dry’ often matters more than the exact temperature.

Mar · Apr · May · Sep · Oct · Nov

Shoulder seasons (changeable coastal weather): pleasant when clear, cooler when wet

Avg low 9–16°C / high 14–22°C · Rainy days: 9–16 / ~90–190 mm

  • Clear sun can feel great, but overcast/rain flips comfort fast.
  • Breeze can make mornings and evenings feel cooler.
  • Sep–Nov can include longer drizzle runs and occasional heavier rain.

Suggested outfits

  • · Thin waterproof/windbreaker
  • · Layering pieces (long sleeves/light knit)
  • · Waterproof pouch + spare socks

A note for travelers

Assume the day will change at least once—layers handle it best.

Jun · Jul · Aug

Summer (warm + breezy): pleasant days, cool-leaning evenings, and rain still possible

Avg low 16–19°C / high 22–26°C · Rainy days: 6–12 / ~60–120 mm

  • Even in mid-summer, evenings can feel cool with breeze.
  • Rain doesn’t disappear completely—light waterproofing helps.
  • Humidity can make the same temperature feel heavier.

Suggested outfits

  • · T-shirts/light long sleeves + thin outer layer
  • · Light waterproof jacket option
  • · Walking shoes with traction

A note for travelers

A thin layer often solves both breezy evenings and quick showers.

Want detailed monthly weather?

Pick a month below to see detailed average temperatures, rainfall, outfit ideas, and travel tips.

Explore San Sebastian

These pages are connected so you can compare conditions and decide for yourself.

San Sebastian monthly weather overview — seasons & best time to visit | CityWeather | CityWeather