In reply to Charlie Low:
Never climbed on this crag in Margalef, however I heard it stays dry in the rain as it's a cave (seen it from across the road on the El Laboratori).
Cova Soleiada - you have 3 routes in sixes - 6c, 6b, 6b+.
I am sure there are plenty of things which stay dry - best bet is asking Viscent who works in the Refugi, he'll surely point you in the right direction.
I remember doing two nice routes in the 6s at Cingles de Moli in a light rain. - Segallosa - 6a, absolute jug fest, which is a gently overhanging so stays dry, top 2 clips are slabby however you're on monster jugs and it's ok even in the wet.
6b that shares the same anchor - similar story, steep first bit, juggy arete finish.
The steep right hand side of Espadelles might be perma dry - there are several 6bs and 6b+s (steep start...then OK to the top), however only been there in outstandingly sunny conditions, so best to check with the locals.