A west to northwesterly airflow slowly builds over New Zealand today with a cold front hitting the lower South Island around midnight.

Northland, Auckland, Waikato & Bay Of Plenty
Some cloud, may be a light shower or two. Dry areas and some sun increasing from afternoon. The Waikato and Bay Of Plenty may become mostly sunny in the afternoon. West to southwesterly winds.
Highs: 15-17

Western North Island (including Central North Island)
Mostly sunny, some cloud later in the day brings a light shower or two to coastal areas. West to Northwesterly winds.
Highs: 14-15

Eastern North Island
Mostly sunny after any early cloud clears, a few early showers about Gisborne clear. Light southwesterlies tend northeast in the afternoon.
Highs: 15-17

Wellington
Morning sunny spells then expect more frequent cloudy areas as the day moves along, north to northwesterly winds freshen.
High: 13-14

Marlborough & Nelson
Sunny with light winds then afternoon north to northwest breezes. Warmest afternoon temperatures will be for eastern coastal Marlborough.
Highs: 15-19

Canterbury
Mostly sunny with some developing high cloud, mainly later in the day. North to northeasterly winds near the coast then northwesterlies about inland areas push through to the coast in the evening.
Highs: 16-18

West Coast
Mostly cloudy with the odd light shower, rain moves into Fiordland during the afternoon then becoming heavy. Northwesterlies gradually increase.
Highs: 13-14

Southland & Otago
Sunny areas and increasing high cloud, overnight rain as northwesterlies change southwest.
Highs: 17-19

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz