A northerly airflow gradually increases over the country on Saturday. A front and associated complex low pressure system moves onto western New Zealand on Sunday.

Mostly sunny for the upper North Island on Saturday, a chance of some morning low cloud or fog however. Northland could see an isolated shower late afternoon / evening. A few morning showers for the lower western North Island the drying out. Mostly sunny along the east coast with developing high cloud. Cloudy areas along the West Coast of the South Island, chance of a shower mainly afternoon on wards. Sunny areas and thickening high cloud out east.

As a frontal system moves towards the western North Island during Sunday expect northerly winds to build, showers become more frequent then heavy rain moves in by evening. Cloudy for the South Islands West Coast with showers, areas of heavy rain possible from afternoon. Dry in the east then scattered areas of rain develop by evening.

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz