Severe gale winds of up to 120km/h will whip up from the foot of the South Island overnight bringing rain to most areas by Sunday.
"Strong northwesterlies will move north from the South Island on Saturday reaching places like Wellington later in the day," Duncan said.
"These could reach hurricane force in the Cook Strait then hug the coast up through Taranaki before reaching Waikato and Auckland.
"This could lead to some bumpy flights in and out of Auckland Airport on Sunday.
"But the rain that will come with the winds will be welcome in Canterbury where there is a bit of a drought."
Police have issued warnings to motorists to take extra care in the central district this weekend -- particularly through and around the Desert Road.
Three people died in a crash on the Desert Road on Monday when a car collided with a truck.
But although snow could fall in the area at the weekend, this is not likely to be as heavy as it was last week and icy conditions are not expected due to strong winds.
By Sunday temperatures across the country will be more typical for this time of year -- from 11C to 15C.
"People are complaining about how cold it has been this winter," Duncan added. "But it has actually been pretty normal for this time of year.
"Some of the unusually warm weather we have been having just makes it seem like it is colder."
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