A strong northwesterly airflow lies over the South Island and lower North Island today, a front within this flow moves northwards over the South Island with heavy rain expected in the west.

Northland, Auckland, Waikato & Bay Of Plenty
Partly cloudy, a few showers possible for western Waikato from afternoon. North to northwesterly winds.
Highs: 14-16

Western North Island (including Central North Island)
Cloudy areas and the odd shower, gusty northwesterly winds.
Highs: 9-15

Eastern North Island
Sun and increasing high cloud, northwesterly winds, strong for Wairarapa.
Highs: 14-18

Wellington
Cloudy areas, the odd spit or shower mainly in the north. Gale northwesterly winds.
High: 14

Marlborough & Nelson
Partly cloudy, rain spreads into Nelson from evening then overnight into Marlborough from the west. Strong northwesterlies, rising to gale for Marlborough.
Highs: 15-16

Canterbury
High cloud, heavy rain moves into the high country during the morning. Spots of rain spread eastwards in the afternoon then clearing evening. Strong northwestlies, a risk of gales mainly inland and about North Canterbury.
Highs: 11-17

West Coast
Showers, heavy rain for South Westland moves into North Westland by midday then Buller by evening. Thunderstorms possible. Gusty or strong northwesterlies.
Highs: 12-14

Southland & Otago
Morning rain, heavy about the Lakes District then easing around midday. Scattered rain or showers push back in again in the afternoon although staying dry for eastern Otago. Gusty or strong northwesterlies.
Highs: 14-16