Aste Nagusia, or Big Week, is San Sebastián’s main summer festival. Around 15 August, the city combines the International Fireworks Competition with concerts, family activities, Basque rural sports and the popular events organised by Donostiako Piratak.
The dates and programme change every year, so check the official festival agenda before planning your visit. The atmosphere spreads through the centre, La Concha Bay and the nearby neighbourhoods.
What is Aste Nagusia?
The festival grew out of San Sebastián’s summer tradition and its history as a resort for visitors and European royalty. Today it brings together official events, popular culture and activities for different ages.
The Cañonazo, or Cannon Shot, at Alderdi Eder marks the symbolic start of the celebrations.
Fireworks over La Concha Bay
The International Fireworks Competition is the best-known event of Big Week. Each evening, a different company presents its show above La Concha Bay, with the sea and the city as a backdrop.
Alderdi Eder and La Concha’s promenade are usually the busiest viewpoints. For a different perspective, try Paseo Nuevo, Zurriola Beach or the slopes of Mount Urgull. Arrive early and expect slow journeys after the show.
Donostiako Piratak and the Boarding
Donostiako Piratak brings a popular and participatory side to the festival. Their best-known event is the Abordaje, or Boarding: groups build homemade boats and gather in the bay for a colourful celebration of music and humour.
If you take part, follow the organisers’ instructions and respect the bathing areas. If you prefer to watch, the harbour and the area around La Concha offer several viewpoints.
Concerts, giants and Basque rural sports
- Live music: open-air concerts, especially around Sagüés and other central venues, cover different styles. The line-up changes each year.
- Giants and big-heads: a family tradition that brings music and costumes to the streets.
- Herri kirolak: demonstrations of Basque rural sports, such as stone lifting and log cutting, bring local traditions into the city.
Practical tips for your visit
- Check the official programme and any last-minute timetable changes.
- Book accommodation early if you plan to visit in August.
- Walk or use public transport when streets are busy or traffic restrictions are in place.
- Wear comfortable shoes and bring a light layer for concerts by the sea.
- Combine the festival with a visit to the Old Town, the bay and the coastal promenades.
Big Week is as much about the small rituals as the headline events: an evening walk along La Concha, an ice cream before the fireworks, a brass band in a square or pintxos in the Old Town after the music.
For more context, see our guide to culture and festivals in San Sebastián and our practical guide to getting around the city.