If you’re planning to visit Bilbao in August, there’s one event you simply can’t miss: Aste Nagusia, or the Big Week of Bilbao – one of the most vibrant and authentic festivals in northern Spain. For nine days, the city transforms into a stage of music, food, culture and Basque tradition, with every corner bursting with festive energy. And from Hotel Sirimiri, right in the heart of the city, you’ll have the perfect base to experience it all… comfortably and on foot.
What is Aste Nagusia and when is it held?
Aste Nagusia, which means “Big Week” in Basque, takes place every year at the end of August. In 2025, the festival runs from 16th to 24th August. It kicks off with a lively opening speech and the launching of the traditional chupinazo from the Arriaga Theatre, marking the start of nine continuous days of celebration. One of the most iconic figures is Marijaia, the beloved symbol of the festivities. With raised arms and a permanent smile, she embodies the cheerful, inclusive and community spirit of Bilbao during its biggest week of the year.
Must-do experiences to enjoy Aste Nagusia like a local
Want to experience Aste Nagusia like a true Bilbao local? Here’s what not to miss:
Txosnas in El Arenal
These festive stalls, set up by local groups, are the heart and soul of the celebration. Expect live music, local dishes and a 100% authentic atmosphere—perfect for dancing, sampling Basque flavours and soaking up the festive spirit.
Fireworks
Each night, the sky over the river lights up with a spectacular international fireworks competition, launched from Etxebarria Park. A visual feast for all ages.
Free concerts
From big-name artists to local bands, music takes over the city with open-air stages in spots like Abandoibarra, Plaza Nueva and Plaza Circular. And best of all? It’s completely free.
Activities for all ages
Street theatre, parades of giants and “cabezudos”, traditional Basque rural sports (herri kirolak), and much more. Aste Nagusia is an inclusive festival designed for everyone.
Pintxo tour in the Old Town
Just a few steps from Hotel Sirimiri, the Casco Viejo is home to some of the best pintxo bars in Bilbao. It's the perfect place to take a gourmet break between events—midday or at sunset.
Practical tips
Make the most of the city by using public transport (metro, tram or buses), wear comfortable shoes, and check the key event times to avoid crowds. Bilbao is well organised during Aste Nagusia, but a bit of planning goes a long way.
A peaceful base amid the buzz: Hotel Sirimiri
After a full day of fun, music and celebration, you’ll want somewhere to rest and recharge. Hotel Sirimiri is the perfect base to experience the Big Week: just minutes from the centre yet located in a peaceful area, offering the perfect mix of convenience and calm.
Enjoy modern, comfortable rooms, a daily breakfast buffet, and easy access to all major festival locations. You’ll also find informative leaflets at reception with the full Aste Nagusia programme and handy tips to make the most of your visit. You can also check them out here.
This August, experience
Bilbao like a local
—full of passion, flavour and tradition. And do it from a place that makes it easy:
Hotel Sirimiri
, at the heart of it all, so you don’t miss a thing.