A westerly airflow lies over the North Island today meanwhile a cool change / front pushes northwards over the South Island.

Northland, Auckland, Waikato & Bay Of Plenty
Any morning cloud breaks away then mostly sunny with westerly winds. Some high cloud develops from afternoon moving in from the west.
Highs: 23-26

Western North Island (including Central North Island)
Mostly sunny with some developing high cloud, morning cloud about Kapiti breaks away. Evening cloud and showers moves into Kapiti and Taranaki then spreading elsewhere overnight. Northwesterly winds.
Highs: 20-25

Eastern North Island
Mostly sunny with light winds, tending northeast in the afternoon for Hawkes Bay and Gisborne. Winds tending northwest about Wairarapa all day.
Highs: 23-26

Wellington
Sunny spells, northerlies becoming breezy around midday.
High: 21

Marlborough & Nelson
Mostly sunny with some high cloud. Nelson sees mid level cloud thicken up in the afternoon then breaking away evening. North to northwesterly winds.
Highs: 22-27

Canterbury
Mostly sunny, morning high cloud breaks away. Northerlies change southwest in the evening bringing a few showers.
Highs: 24-27

West Coast
Rain about South Westland spreads into North Westland around midday, easing evening as northeast winds change southwest. There may be some morning sun about Buller before clouding over around midday.
Highs: 16-20

Southland & Otago
Showers for Southland, clearing late afternoon as northerlies change southwest. Some sun breaks through later in the day before dusk. Otago has morning high cloud and some sun, showers develop in the afternoon (may be an isolated heavy fall) with a southwest change then easing evening.
Highs: 16-21

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz