Hey Mongol! Was over there at the end of January last year and same thing. Did get a couple of good days in. The best day was at Buarcos. 3+ meter faces which is perfect for me.
Nazzare was only 5-6 meters. Not that I would surf that at this juncture, but really wanted to see some monsters! I live about 4 hours from the ocean at the moment and don't get out too much nowadays. Went to the Outer Banks in North Carolina a couple times this winter. Used to live in Nor Cal and Maui and have surfed lots spots around the world.
Hope you good some good action while you're there! Oh, and have some pasteis de nata for me!!!