This year the Festival starts on the 08.11. with Miles Smiles and finishes on the 18.11. with Paquito D'Rivera.
The Jazz Festival in Granada is brilliant.If you like Jazz it would be a great time to visit Granada. The weather is often really good in November and everyting is cheap because it is low season. Throughout the Jazz Festival there is a lot of Jazz in bars as well as at the big venues.
There is more info on the Festival Website.