h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

My husband, mother and myself will be flying to Spain for a two week holiday at a freinds villa on the Costa Blanca. Oh yes, I forgot to mention the three children aged 12, 8, & 7. Well be leaving Gatwick on sunday 28th august, so hopefully arriving, flights permitting, somewhere between then and 2002. The villa is on the Cabo de la Nao. This will be our first holiday abroad, and I hoped you might point me in the right direction for the 'must sees while in spain'. What will the weather be like at that time of year, that sort of thing. Any input would be much appreciated. Cheers!