A front is moving northwards over the South Island in the morning, producing cloud and some showers here and there before weakening.
In the North Island, a southwesterly airflow dominates, producing a lot of cloud for most of the island, with winds tending southerly in the afternoon and evening for the lower North Island.

So for the South Island we have mainly cloudy skies in the east, as morning rain eases to showers, before these mostly clear in the evening.
Along the West Coast, some morning rain clears before sunny areas develop in the afternoon.

For the North Island early morning cloud in most places breaks to mostly sunny weather, along with winds from the southwest.
During the afternoon and evening, cloud moves into the lower North Island, then gradually spreading northwards along the East Coast.
This cloud brings the risk of a shower or two also, more so as cloud moves along the East Coast.

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