Growing Hazelnut - climate too warm in coastal Portugal?

Hi everyone,
I'm looking into growing hazelnut, yet am having trouble determining if they will grow will in my area. I have read that certain cultivars are grown commercially in Italy and Australia (zone 9-10, yet am wondering if the winters in my area (coastal Portugal zone 9) may be too mild, and not have enough frost hours. Our typical winter days are 30-45F and some nights may hit 0F. I appreciate any advice on this subject (even including possible cultivars, success chances, etc.)

-Eric C.