September has something of a back-to-school feeling, but it is also a second chance to enjoy Barcelona. The intense summer heat starts to ease, the city gets back into its rhythm after the summer, and the cultural calendar comes back to life. In short, it is one of those months when it is hard to find an excuse to stay at home.
And if there is one date that stands out on the calendar, it is La Mercè. Barcelona’s main annual festival will once again fill the streets from September 23 to 27 with concerts, traditional culture, performances and activities for all ages. But there is much more going on beyond those five days: September is packed with exhibitions, festivals, food, music and plenty of plans to make the most of the final days of summer.
So, if you are looking for what to do in Barcelona in September 2026, here is a selection of plans to make the most of the end of summer.
Highlights and Events in Barcelona in September
Barcelona gets back into full swing in September, and its calendar is proof of it. During the first weeks of the month, there are still plenty of summer plans to enjoy, while the major cultural events and autumn festivals gradually start to appear.
One of the highlights will be Barcelona Gallery Weekend, which will celebrate its twelfth edition from September 17 to 20. Over four days, 25 contemporary and modern art galleries in Barcelona and L’Hospitalet will showcase works by more than 50 national and international artists. In addition, the opening events will be free and open to everyone throughout the weekend.
For those who prefer music, September also brings outdoor festivals. Summer by Brunch Electronik will return to the Joan Brossa Gardens for the final dates of the season, scheduled for September 5 and 13. Electronic music, food and a privileged setting in Montjuïc: a combination that is hard to resist when you still want to make the most of the long afternoons.
And for food lovers, Terra i Gust will be another highlight of the month. From September 25 to 27, the Passeig dels Til·lers in Parc de la Ciutadella will host this sustainable food festival as part of La Mercè, featuring restaurants, local producers, workshops and food-related activities.
In other words, if you are looking for things to do in Barcelona in September 2026, it will be hard to get bored.
La Mercè: The City’s Biggest Event of the Month
There are events, and then there is La Mercè. Barcelona’s main annual festival is undoubtedly one of the biggest events on the city’s calendar. And in 2026, it will once again turn Barcelona into one huge stage from September 23 to 27.
The music programme will be particularly extensive: this year’s edition will feature 109 concerts across 16 stages, with everything from classical music to pop, rock, rumba, flamenco and more experimental sounds. The announced lineup includes La Pegatina, Els Catarres, Svetlana, Sabor de Gràcia, María Terremoto, Luísa Sobral and Nacho Vegas, among many others.
But La Mercè is about much more than concerts. The festival brings together music, dance, circus and traditional Catalan culture, creating that unique atmosphere over several days when it feels as though the whole city has something to celebrate.
One of the best ways to enjoy it is simply to go with the flow. Check the programme, pick a couple of activities and let the rest of the day unfold as you go. Because trying to see absolutely everything is probably the quickest way to end up needing a holiday after your holiday.
What’s more, La Mercè 2026 will coincide with a special promotion at Mirador Torre Glòries. From September 23 to 27, visitors will be able to take advantage of a 2-for-1 ticket promotion, an opportunity to discover Barcelona from one of its great architectural icons during the very days of the city’s main festival.
End-of-Summer Plans in Barcelona
September still retains something of summer. And it would be a shame not to make the most of it.
During the first days of the month, you can still find plenty of outdoor plans, terraces, festivals and activities that let you enjoy the city without having to retreat indoors. One example is Open Air, the summer version of Churros con Chocolate, which will hold its final sessions on September 6 and 13 at La Terrrazza. Music, sunsets and a festive atmosphere to extend the summer season just a little longer.
September is also a good time to rediscover Montjuïc. Its gardens, cultural spaces and views make the mountain a great option for spending an afternoon without having to cross half the city.
And if the weather is on your side, there is always the simplest option of all: strolling through Barceloneta, heading down to the sea at the end of the afternoon or sitting at a terrace. September has the advantage that you can still make summer plans, but without quite as much of a feeling that you are competing with the thermometer.
Cultural Plans for September
With the arrival of September, Barcelona’s cultural calendar picks up the pace again. Museums, galleries, cultural centres and creative spaces fill the calendar with exhibitions and activities.
One of the highlights will be Barcelona Gallery Weekend, which from September 17 to 20 will offer the chance to explore different galleries across Barcelona and L’Hospitalet and discover contemporary art in a more open, urban setting. With 25 participating galleries and more than 50 artists, it is a great excuse to create your own cultural route through different neighbourhoods.
There will also be exhibitions that are entering their final days in September. At Disseny Hub Barcelona, for example, Seny i rauxa. Notícia de l’arquitectura catalana can be visited until September 6. The exhibition brings together more than 500 pieces exploring a century and a half of Catalan architecture, drawing connections between projects and generations beyond a traditional chronological approach.
And for those who want to combine culture with a stroll, September is the perfect time to explore neighbourhoods such as El Raval, El Born, Gràcia and Eixample, stopping by galleries, bookshops and small cultural spaces that often go unnoticed.
The trick is not to try to turn everything into a race. An exhibition, a coffee and a walk can make for a much more complete day than you might expect.
Afternoon and Sunset Plans
There is something about September that makes you want to make the most of the afternoons. The sun still shines for much of the day, but temperatures tend to ease off a little, making an afternoon stroll much more enjoyable as the day begins to wind down.
Montjuïc is one of the classic options. You can explore its gardens, stop at one of its viewpoints and finish by watching Barcelona begin to light up.
Another possibility is to walk along the seafront. The light at the end of the day transforms the Mediterranean and turns what might seem like a simple stroll into one of those plans that requires very little planning.
And, of course, there is always the option of finding a terrace with a great view. September is probably one of the last months of the year when sitting outdoors at the end of the afternoon remains such an appealing plan.
The key is choosing the right time. During the day, Barcelona can feel like a fast-paced city, but at sunset, its rhythm changes. And that is precisely when it is worth slowing down for a while.
Places with good views in Barcelona
Barcelona is best enjoyed on foot, but it is also well worth seeing from above. The city’s geography is particularly well suited to viewpoints: the sea on one side, Collserola on the other, and an urban skyline filled with instantly recognisable landmarks.
You can head up to Montjuïc, find one of its panoramic terraces or visit one of the city’s natural viewpoints. But if you are looking for a truly different perspective, there is an option that lets you see Barcelona from the heart of its skyline.
Mirador Torre Glòries in September
Mirador Torre Glòries offers an experience that is different from traditional viewpoints. Instead of taking in Barcelona from a mountain, the experience takes you 125 metres above the city, to the top of Torre Glòries, where you can see Barcelona from one of its most iconic architectural landmarks.
The experience begins at Hipermirador Barcelona, a space that combines art, real-time data and large-scale projections to explore the city from different perspectives. The visit then continues to the 30th floor, where a 360º panoramic view of Barcelona awaits.
From there, you can spot some of the city’s most recognisable landmarks: the Sagrada Família, the Mediterranean, Montjuïc and Collserola. But you can also keep things much simpler: take some photos and watch the city go about its daily life.
And September is a particularly interesting time to visit. The city gets back into full swing after the summer and, during La Mercè, Barcelona takes on an especially lively atmosphere. From September 23 to 27, Mirador Torre Glòries will offer a 2-for-1 ticket promotion, coinciding with the days of the city’s main festival.
It is a great plan to combine with other La Mercè Barcelona events: spend the day exploring the city, head to one of the concerts and finish by taking in Barcelona from above.
Because after spending the whole day exploring its streets, perhaps the best way to understand the city is to see it from above.
Tips for visiting Barcelona in September
If you are planning a visit to Barcelona in September, there are a few things worth keeping in mind.
Book the most popular activities in advance. September brings the return of tourist activity and, in addition, La Mercè concentrates a large number of visitors and activities over just a few days. If you know there is a particular place you want to visit, especially during the city’s main festival, it is best to plan ahead.
Make the most of the early and late hours of the day. September is still a pleasant month for outdoor activities, although the middle of the day can remain warm. Getting up early or waiting until the late afternoon can make the experience much more comfortable.
Check the La Mercè programme before heading out. With 109 concerts and activities spread across different venues, it is worth checking what is happening each day and choosing your favourites.
Combine different plans. A cultural morning can end with a stroll through the city centre; an afternoon in Montjuïc can be followed by dinner; and a day dedicated to La Mercè can finish with views of Barcelona from Mirador Torre Glòries.
And above all, don’t try to do everything. Barcelona in September offers enough plans to fill several itineraries, but part of the charm lies precisely in leaving some time free. Sitting in a square, having a drink on a terrace, getting lost in a neighbourhood or watching the city at sunset are all part of the experience.
September marks the end of summer, but in Barcelona it also feels like a new beginning. The city gets back into its rhythm, major events return and the streets once again fill with music, culture and life.
So, if you were looking for what to do in Barcelona in September 2026, you already have your answer: enjoy La Mercè, make the most of the last days of summer, discover new cultural experiences, get lost around the city and, why not, head a few metres higher to see it from a different perspective.
Because Barcelona changes with the seasons. And September is one of the best times to discover it all over again.
