That means Auckland residents can expect a fine morning before showers and rain develop in the afternoon as the city head for a Saturday high of 17c.
Sunday should then be relatively fine before heavy rainfall hits Monday and Tuesday, MetService says.
Whangārei in the north will be hit by even more falls as the city reaches a high of 18C today but rain continues from today all through next week until Friday.
Hamilton, meanwhile, could be hit by heavy rain this evening as it heads for a top of 16C with heavy falls possible on Monday and Tuesday also.
Tauranga residents are set for rain and a high of 17C today before heavy falls develop on Monday and Tuesday.
Further south, Wellington and the Cook Strait will be blasted by strong winds, gusting 100km/h in exposed places.
The city can expect a top of 15C as morning rain clears for breaks of fine weather. Sunday should then be fine with a top of 14C.
In the South Island, Christchurch looks set for a mostly fine and rain free week, with a few showers possible as the city heads for a balmy top of 20C.
Dunedin and Invercargill, however, are likely to be hit by heavy rain and strong winds this morning as Invercargill temperatures range from 7C to 10C over the next few days.
WeatherWatch says the Southern Ocean storm could send snow flurries into parts of Southland on Sunday.
A strong wind warning is in place for parts of coastal Southland and Stewart Island on Sunday.
Heavy rain was also expected overnight along the South Island's West Coast.
