A polar blast is forecast to chill the winterless north, with the region's temperatures set to plummet to near record lows.
As of Wednesday morning, a burst of cold air "straight from Antarctica" had snow falling on the South Island, with temperatures between -5C and -10C predicted.
MetService issued a heavy snow warning for the far south of the South Island and Banks Peninsula.
But Northland's chances of experiencing a flurry like its southern counterparts are "about zero", MetService meteorologist Lewis Ferris said.