e-mail the tourist information at -'ptcalella@publintur.es'
i found them very helpful, their english is not brilliant but their reply was useful for us.

this website also had a lot of info -
http://calella-spain.travel-holiday-guide.co.uk/
we loved calella for its choice of restaurants and the old town area, but the beach was a bit steep for my partner to go swimming.
best tip for this resort is to get the noddy train right round the resort and then use it instead of taxis. it is very cheap.