
Barcelona in September
Summer ease returns
- Temperature
- 18–26°C
- Crowds
- High
- Prices
- €€€€
+Warm weather with slightly less intense heat.
–Crowds remain high; La Mercè can create an additional spike.
Late-September warmth with the sea still at its best.


Barcelona and Madrid are close in September. Barcelona averages 18–26°C with high crowds; Madrid 16–26°C with moderate–high crowds.
By Daan · Last reviewed October 2026
Barcelona and Madrid
The verdict for September

Summer ease returns
+Warm weather with slightly less intense heat.
–Crowds remain high; La Mercè can create an additional spike.
Late-September warmth with the sea still at its best.

Summer warmth with autumn breathing room.
+Warm weather + lively city
–Popular dates can be busy
September is one of Madrid’s sweet spots. The extreme summer heat starts easing while sunny days remain common, and the city returns to its normal rhythm after August.
Scores and crowd levels are my own judgement; temperatures are monthly averages. Higher scores are better: quieter, cheaper and more pleasant.
Another month