The exception was Gisborne and southern Wairarapa, which could expect mainly fine weather tomorrow.
Further south, the agency forecast rain and showers for most areas – with slightly better conditions for Nelson and Marlborough – ahead of more rainy weather around New Zealand on Sunday.
“This weekend, in a nutshell, is basically what we’ve been dealing with over the past couple of months – that’s pretty topsy-turvy weather that’s more wet than dry,” Niwa Weather forecaster Ben Noll said.
“The South Island – particularly in the east – should be watching out for showers and maybe even thunderstorm activity during the afternoon tomorrow.”
The messy conditions were expected to begin clearing from Monday, with Northland and Auckland seeing mainly fine weather.
WeatherWatch.co.nz wasn’t forecasting the next high pressure system until next week
“There is more unsettled weather on the way, it must be said,” the company said.
“Our next high looks to be due sometime in early December, the 5th December more accurately although this date will likely vary between now and then.”