High pressure will expand over NZ in the coming days which means moderate to severe frosts across the South Island, and more wintry showers for the eastern side of the South Island up to about East Cape.

A low pressure zone will remain stuck for days just north of NZ bringing rain, showers (and maybe some isolated heavy falls) to the Far North and the northern end of Northland.

Frosty weather in the South Island will expand into the North Island this weekend.

By Tuesday next week colder but drier air heads into Auckland and Northland, while a slightly milder westerly kicks into the lower SI.

Overnight lows in the South Island will be anywhere from around 0 to -10C in places where people live and farm.