I think San Pere de Pescador is better (in summer at least). It's just 100-150km more to the south. Send me an E-mail if you want more info on San Pere de Pescador.
My excperience in Leucate last summer was 2 Beaufort or more than 7 Beaufort. Great for windsurfing but not for a starting kiter.
In the north of Spain most days 3-4 Beaufort (airblast 11.
and some days a bit more (airblast 8.4). Rare are days without wind.