San Sebastián is a jewel in northern Spain, combining the beauty of the coast with a vibrant cultural scene and outstanding cuisine. One of the factors that shapes every visit is the local climate. The weather in San Sebastián is influenced by the nearby Cantabrian Sea and its oceanic climate, which brings mild winters and pleasant summers. Knowing what to expect throughout the year will help you make the most of your visit.
Before heading out, check the latest forecast for San Sebastián and adapt your plans if conditions change. For the rest of your trip, you can also use our practical guide to San Sebastián.
General characteristics of the weather in San Sebastián
San Sebastián has an oceanic climate, with strong maritime influence that softens both summer heat and winter cold. Average annual temperatures generally range from 12°C to 20°C. Humidity is a constant feature, and rain can occur throughout the year, with heavier periods often arriving in autumn and winter.
This Atlantic influence makes the weather changeable and sometimes unpredictable. A day may begin in sunshine and end with light drizzle. The result is a fresh atmosphere and intensely green landscapes. The sea also brings gentle breezes that can make summer days more comfortable.
Weather in San Sebastián by season
Spring in San Sebastián
Spring, from March to June, is one of the most attractive seasons for enjoying the city. Temperatures begin to rise, usually ranging from 13°C to 18°C. Rain remains fairly common, alternating with increasingly sunny days. Gardens fill with flowers and the city takes on a fresh, lively character.
- Recommended activities: Explore parks and green spaces such as Cristina Enea, walk along La Concha Beach before the summer crowds arrive, follow the Paseo Nuevo and climb Mount Urgull for a different view of the city. It is also a good time to enjoy the bay and the first outdoor events.
Summer in San Sebastián
Summer, from June to September, brings pleasant temperatures of around 20°C to 25°C, although they rarely rise above 30°C. Rainfall is generally lower and the longer days are ideal for outdoor activities.
- Recommended activities: Enjoy the beaches, whether relaxing on La Concha or trying water sports and surfing at Zurriola Beach. Explore the Old Town and take part in festivals such as Semana Grande and the Jazz Festival. Terraces are especially inviting for pintxos and cider.
Autumn in San Sebastián
Autumn, from September to December, brings a gradual fall in temperatures, generally between 14°C and 20°C, together with more frequent rainfall. Parks and gardens change colour, giving the city warm shades of red and gold.
- Recommended activities: Autumn suits visitors who want to combine culture and nature. Walk or hike around Mount Igueldo and Mount Urgull, visit museums and exhibition spaces, and look for food events where Basque cuisine can be enjoyed without the busiest summer crowds.
Winter in San Sebastián
Winter, from December to March, is humid, with temperatures usually staying between 8°C and 14°C. Rain is more frequent, but extremely cold days are unusual because of the sea. The season gives the city a quieter, more relaxed atmosphere.
- Recommended activities: Winter is a good time for cultural plans, including the San Telmo Museum and the Aquarium. It is also a chance to enjoy local food in the Old Town, from fish soup to hearty stews. Christmas lights and the seasonal market add life to the streets, while moderate temperatures still allow you to walk around the city.
Tips for enjoying the weather in San Sebastián
The weather can change quickly, so pack accordingly. In spring and autumn, a light waterproof jacket is essential. In summer, choose cool, comfortable clothes but keep a jacket nearby for cooler evenings. In winter, bring a warm coat and an umbrella.
- Preparation: Comfortable shoes are essential because walking is one of the best ways to discover San Sebastián. Cloudy or rainy days are part of the city’s character, and they can still be a good opportunity to explore museums, cafés and the Old Town.
Conclusion
The weather in San Sebastián gives the city a changing, lively atmosphere throughout the year. Rain and mild temperatures keep the air fresh and the landscapes green. Whether you are spending a beach day in summer, walking through gardens in spring, exploring the historic centre in autumn or taking shelter in a café in winter, San Sebastián has something to offer in every season.