In reply to BennyBoy:
Benny,
It's going to be hot. Really hot.
The closest crags to Perpignan are all low-lying limestone sports crags. I think most of them are south-facing as well, just for that real furnace feel. Vingrau, Tautavel and maybe some others.
You'll need to either climb very early or very late for those places.
A much better bet would be to drive up into the mountains. You'll only be 1h30 from the bouldering at Targasonne, and only about 40mins from the bouldering at Eus (spot of the moment, apparently)
There's also some nice-looking granite around the canigou massif.
This page
http://www.pyrenees-pireneus.com/ESCalade%20pyrenees%20orientales.htm has a list of sites.
Have a good trip
Tim