A west to northwesterly airflow lies over New Zealand today, conditions may be unstable about the western North Island.

Northland, Auckland, Waikato & Bay Of Plenty
Showers, some may be heavy with thunder then clearing later in the evening. The odd shower may remain out west overnight. Breezy northwesterly winds.
Highs: 16-18

Western North Island (including Central North Island)
Showers, some may be heavy with thunderstorms and hail then easing late afternoon / evening. Breezy northwesterly winds.
Highs: 13-16

Eastern North Island
Mostly sunny, some high cloud. Northwesterly winds.
Highs: 17-20

Wellington
The odd spit or shower, sun breaks through at times. Brisk northwesterly winds.
High: 15

Marlborough & Nelson
Sunny areas and some high cloud, the odd shower may spread into Nelson at times afternoon onwards from the west. Breezy northwesterly winds.
Highs: 14-17

Canterbury
Mostly cloudy Banks Peninsula southwards, a few showers develop in the morning then clearing in the afternoon with light southwesterly winds. Further north expect mainly dry weather with warmer temperatures, high cloud in the morning then mid level cloud thickens up in the afternoon.
Highs: 11-15

West Coast
Rain, heavy in the morning then gradually easing during the day. Northerlies tend northwest.
Highs: 11-13

Southland & Otago
Mostly cloudy, risk of a shower. Late evening or overnight showers likely for Southland. Light winds.
Highs: 12-13

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz