Gale-force winds and heavy rain are expected to hit the North Island midweek, replacing mainly fine conditions over the weekend.
A deepening sub-tropical low is forecast to move over the North Island from the north on Monday before slowly moving off to the southeast of the country.
Through Tuesday and Wednesday the low was expected to move southwards across the North Island, bringing southeast gales and heavy rain.
The MetService has issued severe weather warnings and watches.
On Tuesday there is a high chance that rainfall could reach warning levels over Gisborne and northern Hawke's Bay.
There is also a 40 per cent chance of gales becoming severe about the "western slopes from East Cape to Taihape and Taranaki".