A front passes over the North Island today moving in a west to east fashion clearing off to the east by late afternoon. A west to southwesterly airflow lies over the South Island.

Northland, Auckland, Waikato & Bay Of Plenty
Morning rain (possibly heavy) eases to showers and some sun as north to northwesterly winds change westerly. Overnight or perhaps more towards dawn on Wednesday heavy showers with a risk of thunderstorms and hail move into western areas.
Highs: 14-16

Western North Island (including Central North Island)
Morning rain, possibly heavy then easing to showers by midday as northerlies tend northwest. Overnight heavy showers move in with a chance of thunderstorms and hail.
Highs: 12-15

Eastern North Island
Thick high cloud, rain develops in the morning then clearing in the afternoon with northeasterlies tending northwest. There may be some sun late in the day before dusk. Rain may not arrive in Gisborne till afternoon then clearing in the evening.
Highs: 15-17

Wellington
Morning rain (possibly heavy) then easing to the odd shower and sunny spells, mainly dry by evening. Northwesterly winds.
High: 13

Marlborough & Nelson
Early rain clears then becoming sunny in the afternoon, northwesterly winds.
Highs: 13-16

Canterbury
Partly cloudy, risk of a shower or two. Light winds tend south to southwest by midday.
Highs: 10-12

West Coast
Morning rain eases to showers in the morning, long dry spells by evening. Northerlies change west to southwest around midday.
Highs: 9-12

Southland & Otago
Mostly cloudy about Southland with occasional showers, light south to southwesterly winds. Otago has sunny spells then a few showers develop by evening as light winds tend southerly.
Highs: 6-9

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz