The large low from the Tasman Sea is weakening, finally, and will today drift into the North Island making ‘landfall’. Wind directions will be a bit ‘all over the place’ for some areas as the cyclonic airflow around the centre moves through. The centre of the low is unravelling and is falling apart.

Around the centre is rain/downpours. To the north are nor’westers, to the south sou’easters.

Upper North Island
A period of rain or downpours, some quite heavy. Less humid NW winds kicking in. Dry spells increasing later today with sunny spells possible.
Highs: 23 to 26
Lows: 15 to 18

Lower North Island:
Rain or downpours developing and tracking across the Lower North Island.  Variable wind directions.
Highs: 18 to 24
Lows: 13 to 16

Upper South Island:
Rain, heavy at times around Nelson and Marlborough, easing to showers later. Fairly dry in North Canterbury, but drizzle or a shower possible. Variable wind directions.
Highs: 15 to 21
Lows: 12 to 16

Lower South Island:
Patchy rain moving in to many areas from the north east. Winds from the east to south east. A cool day.
Highs: 11 or 12
Lows: 8 to 10

– WeatherWatch.co.nz