More heavy rain is on its way for soaked areas of New Zealand as twin lows move in from the Tasman Sea.

Forecasters say rainy weather will set in tomorrow and remain in place until Thursday, before giving way to another even deeper low over the weekend. analyst Philip Duncan said the North Island would bear the brunt of the rain from both systems.

Already drenched areas such as Coromandel, Waikato, Bay of Plenty and Gisborne would be hit with more downpours, he said.


"Parts of western Bay of Plenty have had over half a metre of rain in the past four weeks, this rain will no longer be welcome by most North Islanders."

The second low, which is set to arrive at the weekend, could bring torrential downpours, Mr Duncan said.

However, the coldest days of winter are over and the storm is unlikely to be accompanied by low temperatures, he said.

Metservice meteorologist Daniel Corbett said the procession of weather systems will maintain an "unsettled theme" in the weather across New Zealand

Rain will hit northern and eastern New Zealand from Tuesday until Thursday, with some thunderstorms are likely in the northern half of the North Island, he said.

"With several different weather systems to come, it will again be a week where we keep the raincoats close to hand."

The end of the week will be drier, before another active system moves over the country, Mr Corbett said.