A westerly airflow lies over the North Island today meanwhile a weak low covers the south Island.

Northland, Auckland, Waikato & Bay Of Plenty
Sunny spells with west to southwesterly winds, there may be a shower or two for Northland through to Waikato at times especially in the west. The Bay Of Plenty has a mostly sunny day.
Highs: 23-24

Western North Island (including Central North Island)
A dry morning with some sun, showers develop in the afternoon as light winds tend to the west. Chance of an isolated heavy fall for inland areas. Showers clear overnight.
Highs: 18-20

Eastern North Island
Morning sunny spells, showers develop in the afternoon possibly heavy with thunderstorms then clearing overnight. Showers most likely about the ranges but heavy falls possible near the coast also. Light winds tend to the south.
Highs: 20-23

Wellington
Partly cloudy, morning southerlies then tending to the northwest by midday. Showers move in during the evening.
High: 18

Marlborough & Nelson
Cloudy areas, showers develop in the afternoon (mainly about inland areas) then spreading to the coast in the evening, clearing overnight. Light winds.
Highs: 17-20

Canterbury
Some morning sun then cloud thickens in the afternoon bringing showers, especially about inland areas where there could be a heavy fall. Some coastal parts may stay dry till evening then showers move in. Shower activity clearing overnight. Northeasterly winds.
Highs: 16-18

West Coast
Cloudy areas and the odd shower, showers more likely from afternoon then clearing at night. Light winds tend west to southwest after midday.
Highs: 17-20

Southland & Otago
Cloud breaks to some sun in the afternoon for Southland. Otago has a mostly cloudy day, showers develop late morning possibly heavy in the afternoon for inland areas, clearing at night. Cool south to southwesterly winds.
Highs: 16-18

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz