It's going to get warm and wet then very chilly over the next few days, as a deep low pushes in from the Tasman followed by some Antarctic blasts.
MetService has issued a severe weather watch for the north and west of the country. The wet weather is set to arrive on Tuesday night and wash over the country on Thursday, bringing warm rain with northerly winds.
But as it leaves off the east coast of New Zealand, the damp low will leave space for icy southwesterly blasts from Antarctica on Friday, MetService says.
The heavy rain is forecast to hit Northland and northwest Nelson worst.
In the Bay of Plenty the heaviest falls, with thunderstorms, are expected around the ranges east of Opotiki - about 60km east of flood-hit Edgecumbe.
Strong winds are also expected with the low. In Auckland northeast winds may rise to severe gale in exposed places on Wednesday, MetService says.
By Friday snow is expected to fall to low levels in the far south, as the cold air blows up the country.