Weather
Average highs sit around 25°C with lows near 18°C. Rainfall is moderate; the odd shower is likely.
Crowds & demand
Crowd levels are High for Barcelona — the biggest crowds of the year.
Prices & value
Prices run mid-range this month: prices close to the yearly average.
Events & what’s on
Look out for La Mercè Festival while you’re there.
- La Mercè Festival — Human towers and fire runs headline the city’s biggest party.
The verdict
September is one of the best times to visit Barcelona. Expect 25° / 18°, the biggest crowds of the year and prices close to the yearly average.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated July 2026
