On Tuesday we have a west to northwesterly airflow over the North Island, before a front pushes into western areas late in the morning, running in a northwest to southeast orientation.

Another front moves onto the southwestern corner of the North Island during the late afternoon and into evening, then pushes northwards.
So for the North Island we have showers in the west, and high cloud out east – but showers pushing into the Wairarapa in the evening, and further north overnight.

For the South Island, we have a cool southerly change moving up the east coast in the morning, bringing cloudy skies and patchy showers or drizzle for most.
The West Coast sees morning rain clear, then sunny areas develop with southwest winds.
Otago sees any morning showers clear too, and sunny areas develop, along with breezy southwest winds easing later in the day.

– Aaron Wilkinson & Drew Chappell, WeatherWatch.co.nz