A large low lies in the Tasman Sea today, the outer edges of this low extends over New Zealand drawing in a northeasterly airflow over the country. Winds come in from the southeast for the lower and eastern South Island. Becoming unstable this afternoon especially for the North Island.

Northland, Auckland, Waikato & Bay Of Plenty
Showers, possibly heavy with thunder then easing in the evening. Overnight heavy showers may move back into Northland and Auckland. Light northerly quarter winds.
Highs: 21-22

Western North Island (including Central North Island)
Showers, becoming heavy in the afternoon then clearing at night. Chance of a thunderstorm mainly inland. Light northerlies.
Highs: 18-22

Eastern North Island
Mostly cloudy, a few spits possible. Showers develop in the afternoon especially about the ranges, some becoming heavy with thunderstorms then clearing overnight. Northeasterly winds.
Highs: 20-23

Wellington
A dry morning, sun possible then showers develop in the afternoon, some may become heavy especially inland about the ranges then clearing at night. Light northerlies.
Highs: 19-23

Marlborough & Nelson
Cloudy areas, dry in the morning then showers develop afternoon, some may be heavy before clearing at night. Northerly winds.
Highs: 20-24

Canterbury
Partly cloudy, isolated showers develop about inland areas in the afternoon, some may become heavy with thunder then showers spreading to the coast at night. Light winds.
Highs: 18-22

West Coast
Partly cloudy, a few showers, mainly for Fiordland. In the evening showers spread elsewhere. Light northeasterlies.
Highs: 18-23

Southland & Otago
Mostly cloudy with a few showers, especially for Southland. Isolated showers may become heavy in the afternoon for inland areas. Conditions dry out in the evening for coastal areas. Light southerly winds.
Highs: 16-21