A low just west of the North Island will continue to move slowly across the island on Sunday, spreading thundery rain or showers over the Bay of Plenty.
Metservice stated there was a high risk of significant heavy rain about Bay, Coromandel Peninsula and the Gisborne ranges during Sunday and early Monday, with a low risk over parts of Northland, Auckland, Waikato and Taupo.
Later on Monday, the low is forecast to weaken while crossing the country, with rain or showers for many areas.
Further fronts are expected to move across New Zealand during Tuesday and Wednesday, accompanied by more rain and showers.