When I cycled in the winter, I used a coolmax sleeveless jersey, with a long-sleeved polypro on top of that, with merino wool on top of that, and then often fleece on top of that, and a fairly heavy jacket on top of that.

Because your part of the world is likely quite humid, I'd suggest trying a double wool layer ... the smooth, light merino as a base, and a heavy regular wool sweater on top, with a windbreaker overtop that.

But you can find a lot of this information in the Winter Cycling Forum:
http://www.bikeforums.net/forumdispl...Winter-Cycling