Hey dude, ive been been to lanzarote twice. you want to magic seaweed or wannasurf the place first to give you an idea of what its like. the town where all the waves are in is called la santa - a wave identical to pipe breaks right infront of the town, its got a mean end section tho so watch out

there s more waves around equally as world class, but you ll need a car. If you only going for a week then i would suggest staying in la santa.
A few basics are that there is always swell...always, but to get the wind offshore is another story. Trade winds blow North to North east which is cross to onshore. If you re increadibly lucky you ll get some sort of a south or easterly. I went in peak season last year and got totally skunked with the wind. However I will say this, if you do score it will be with out a shadow of a doubt the best surf of your life. Check out the pics on my profile most of them are from my first trip to lanz.
anyways hope it goes well