A northwest airflow develops on Saturday, especially for the South Island. Northwesterlies continue on Sunday, a front within this flow slowly pushes northwards during the day moving into the lower South Island in the morning reaching central New Zealand around midnight.

Sunny spells for the western North Island on Saturday, mainly dry in the east with some high cloud possible. The South Islands West Coast sees increasing cloud, the odd light shower moves into Fiordland then overnight expect heavy rain. Mainly sunny in the east with some developing high cloud and warm temperatures getting into the mid twenties for some.

Mostly sunny for a majority of the North Island on Sunday, some cloud in the southwest however. Warm out east with high’s in the mid to late twenties. Heavy rain pushes northwards along the West Coast of the South Island during the day, high cloud out east with strong northwest winds about the upper South Island. Some rain moves into Southland in the morning then Otago during the afternoon with a southwest change.

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz