A cold southwesterly airflow lies over New Zealand today.

Northland, Auckland, Waikato & Bay Of Plenty
Cloudy areas and the odd shower at times. The Bay Of Plenty is mainly dry with longer sunny spells, perhaps the risk of a shower from afternoon spreading from the west. Breezy to brisk west to southwesterly winds.
Highs: 15-17

Western North Island (including Central North Island)
Mostly cloudy with occasional showers, especially from afternoon then easing overnight. Gusty westerlies.
Highs: 10-14

Eastern North Island
Mainly sunny weather with breezy westerlies. From late afternoon a few showers move into Wairarapa as winds tend southwest, clearing overnight.
Highs: 15-17

Wellington
Partly cloudy, a shower or two late afternoon / evening as gusty northwesterly winds tend westerly.
High: 13

Marlborough & Nelson
Mostly sunny, some cloud late afternoon / evening brings the risk of a shower otherwise mainly dry. Westerlies pick up in the afternoon then easing later in the day. Winds tending more southwest about Nelson.
Highs: 13-14

Canterbury
Dry at first then southwesterlies freshen in the morning bringing showers. Showers clearing around midday about South Canterbury, North Canterbury in the afternoon then southwesterlies die out by evening. Some snow to about 500 to 400m with showers.
Highs: 6-12

West Coast
Showers, possibly heavy at times with small hail then easing in the evening. Snow to 300m about South Westland, gradually lowering to 400m about North Westland by evening. Fresh cold southwesterly winds.
Highs: 7-9

Southland & Otago
Showers, heavy at times in the morning with hail then easing from afternoon. Snow to 300 or maybe 200m at times. Long dry spells from midday about Central Otago with sun at times. Gusty cold west to southwest winds.
Highs: 5-8

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz