A slow moving front was the main player in the day's weather, according to the MetService, and would bring windy, wet weather to much of the country.
Metservice Meteorologist Josh Griffin said weather watches in place on Saturday paired with grey weather would, in many cases, turn into weather warnings and rain.
Heavy rain warnings were in place from this morning for the Bay of Plenty east of Opotiki and Gisborne north of Tolaga Bay.
"We're expecting about 250ml to accumulate up the ranges and another 200-250ml to accumulate in low-lying areas."
The low weather system could stick around, creating wet weather for these areas until Monday night.
Rain warnings were also in place for the Coromandel Peninsula from 9pm tonight, until 9pm on Monday.
Hawke's Bay would also be hit with some wet weather from this evening.