A large high that sat over New Zealand on Friday is starting to move away to the east, says a WeatherWatch spokesperson. 

A northerly airflow is developing over the South Island today.

There will be a mix of sun and cloud for Bay of Plenty, Northland, Auckland, and Waikato with temperature highs for the four regions between 16 - 18 degrees Celsius.

"Bay of Plenty should be mostly sunny then expect evening cloud there."

WeatherWatch says Coromandel up through to eastern Northland will have the odd shower at times today, along with east to northeasterly winds.

Western North Island (including Central North Island)
Sunny, light winds.
Highs: 15 – 19

Eastern North Island
Mostly cloudy, a few light showers, clearing Hawkes Bay in the afternoon with sun breaking through but not clearing Gisborne till evening. Wairarapa has morning cloud then sun. Winds from the northeast, southeast for Gisborne. 
Highs: 16 – 19

Wellington
Sunny, northerly winds.
Highs: 16 – 19

Marlborough & Nelson
Sunny, light winds tend onshore in the afternoon.
Highs: 16 – 20

Canterbury
Sunny, east to northeasterly winds freshen across the plains from afternoon.
Highs: 17 – 20

West Coast
Mostly sunny, a touch of high cloud especially for South Westland. From evening mid level cloud starts to increase, overnight expect a few showers south of Greymouth. Northeasterlies, strengthening for coastal Fiordland.
Highs: 16 – 18

Southland & Otago
Mostly sunny with some high cloud, light northerlies tend northeast in the afternoon.
Highs: 17 – 21