Shift to interiors
Gaudi, music venues, markets and covered central areas become more valuable.
Reduce exposed hills
Rain is a bad moment to push Park Guell, Bunkers or other exposed climbs unless conditions are still easy.
Keep zones compact
Rainy days improve when you stay within fewer areas and reduce long open-air transitions.
Smart swaps
What to do instead
These swaps usually keep the trip feeling intact.
Swap viewpoint-heavy plans for Casa Batllo or La Pedrera
Architecture still gives atmosphere and keeps you under cover for much of the experience.
Use the centre well
Boqueria, Gothic lanes, cafes and indoor cultural stops can still fill a strong day.
Consider Palau or Liceu
If timing works, music and theatre become even more attractive in bad weather.
Delay the sea and hills
Save Barceloneta, Montjuic or sunset-heavy plans for better conditions if your trip allows.