So when the forecast calls for showers in Barcelona next week, what can one expect. Is it all day, or just a short shower?

Only the weather god knows for sure. My guess is you'll have to wait and find out, so be prepared for anything.

It seems it always rains when we go to Barcelona and we love it anyway, but we're from Seattle. As Robert pointed out, only god can control the weather. Have fun anyways (we do)

As that well know song goes "the rain in spain stays mainly on the plane" - Sound of Music

We were just in Barcelona for three weeks and the weather was gorgeous. There was a little bit of rain,but most of it was at night.

One morning it rained hard, but was beautiful again by 10 am. So I would not worry about the weather.

Nobody knows for sure but we just had a little over 3 weeks of almost completely sunny weather and it has been sunny every time we have been to Barcelona.

Bring your bathing suit and umbrella, but i would bet you will use the bathing suit more. We did!