September in Barcelona averages highs of 25 °C (77 °F) and lows of 18 °C (64 °F), with about 8 rainy days and 12 h 25 min of daylight. The sea is warm, around 25 °C (77 °F).
September weather in Barcelona at a glance
average high to low each dot ≈ 3 rainy days
Is September a good time to visit Barcelona?
Good time to go: comfortably warm and some rain. September is usually high season in Barcelona: book rooms early, as prices are typically at their highest.
Our rule: a month scores 2 points for comfortable average highs of 18–28 °C (1 point for 14–18 or 28–32 °C) and 2 points for 5 or fewer rainy days (1 point for 6–10). Average highs above 35 °C or below 8 °C make it a tough month whatever the rain. A rainy day here means 2 mm of rain or more. 4 points = great, 3 = good, 2 = mixed, 0–1 = tough.
Holidays and events in September 2026
- Fri 11 Sep: National Day of Catalonia (Diada Nacional de Catalunya) public holiday
- La Mercè, Barcelona's city festival, around 24 September event
Banks and many shops close on public holidays, and museums may change their hours, so check before you go.
Things to do in Barcelona in September
September's weather suits a mix of outdoor sights and museums, so the open-air ones come first.
- Park Güell — timed tickets outdoors
- Gothic Quarter and El Born — plus the Picasso Museum outdoors
- Barceloneta beach — and the seafront promenade outdoors
- Montjuïc — castle, gardens and the Miró foundation outdoors
- Sagrada Família — book the first slot indoors
- Casa Batlló and Passeig de Gràcia — Gaudí's best house indoors
- Beach and swimming — the sea averages 25 °C (77 °F) in September. outdoors
Where to stay: Eixample for Gaudí and good transport; Gothic Quarter or El Born for old streets; Gràcia for a local feel.
What to pack for Barcelona in September
- Light layers for the day.
- An umbrella or a light waterproof: about 8 days this month see real rain.
- Swimwear.
- Comfortable walking shoes.
What a day in Barcelona costs
| Budget traveller | Mid-range | |
|---|---|---|
| Typical total per person, per day | €65–145 | €160–320 |
Excluding flights. September is usually high season in Barcelona: book rooms early, as prices are typically at their highest.
September in nearby cities
| City | High / low | Rainy days | Verdict |
|---|---|---|---|
| Nice | 25° / 18° | 5 | Great time to go |
| Madrid | 27° / 15° | 4 | Great time to go |
| Florence | 26° / 15° | 8 | Good time to go |
Plan your Barcelona trip
- ChatGPT vs AI Trip Planner App: Which Plans Better? (2026)
- How to Plan a Group Trip: 7 Steps Without the Drama
- 3 Days in Barcelona Itinerary: First-Timer's Plan for 2026
- Is Barcelona Expensive? A Realistic Budget Guide for 2026
Want the whole trip planned? Join the Journey waitlist: tell it where, when and your budget, and it plans every day hour by hour.
FAQ
Is September a good time to visit Barcelona?
By the numbers, September is a good time to go: comfortably warm and some rain, with average highs of 25 °C (77 °F) and about 8 rainy days. September is usually high season in Barcelona: book rooms early, as prices are typically at their highest. The best months for weather are May, June.
How warm is Barcelona in September?
Average highs are 25 °C (77 °F) and lows 18 °C (64 °F) (2015–2024 averages). The sea is warm, around 25 °C (77 °F).
Does it rain a lot in Barcelona in September?
Expect about 8 days with 2 mm of rain or more, about 91 mm in total. It is the wettest month of the year in Barcelona.
Sources: climate averages from Open-Meteo historical weather (ERA5 reanalysis, 2015–2024); sea temperatures from the Open-Meteo marine API (2023–2024); public holidays from Nager.Date. Daylight is calculated for the 15th of the month. Averages are a guide, not a forecast. Costs are typical ranges per person per day, excluding flights.