Hi happybird_98!
We were talking about this same issue in the "About Spain" forum @
http://www.madridman.com/ubb/Forum16/HTML/000001.html In cities like Madrid, Barcelona, and Sevilla, as well as most of the interior cities, wearing shorts is a big no-no espcecially when entering churches, cathedrals, or most businesses (other than shopping centers of course) is a big no-no. That is to say, you can do it (although you may be asked to leave a cathedral or other place of worship/religion) but you'll win long stares from the locals.
It's different on the coastal towns/cities where beaches are near. As I said in another forum, I wore shorts a few years ago during an unusually hot May and got LOTS of stares. Really, only children wear shorts or sometimes teens and young adults during the hottest of summer months. Most women wear light dresses and men wear thin pants. You could wear jeans, but you'll probably be the warmest in these. Try some some kind of pants and thin shirt during the warmest days.
The Spanish, as you'll see, have a kind of unwritten dress code in public. Most everyone is impressed with how well pressed and coordinated they are.
Have a great time in Spain!!
Saludos, MadridMan
[This message has been edited by MadridMan (edited 05-16-2000).]