It's raining again in the soaked Gisborne and Hawke's Bay regions, prompting warnings to motorists.
State Highway 2 from Napier to Wairoa is closed due to slips north of the Devil's Elbow and around the Mohaka Viaduct near Raupunga, police say.
SH5 from Napier to Taupo is open but there's one lane in several spots.
"If you do have to travel, be on the lookout for road hazards and keep your speed down," Inspector Dean Clifford says.
"There's a lot of wet, unstable ground that could potentially cause problems and road blockages so drivers need to be very careful," Insp Clifford said.
There are slips and trees on rural roads and surface flooding in both rural and urban areas but no motorists are stranded.
Motorists are urged to delay travel if possible, especially through rural areas.
MetService says rain will become persistent and heavier in Gisborne on Thursday afternoon before easing early on Friday morning.
About 130mm of rain fell in the Gisborne region on Sunday and Monday, engorging local rivers and closing bridges.
Further rainfall amounts may approach warning criteria - about 70mm in 12 hours - especially about the ranges, MetService says.
"This week has been a shocker for many, with hardly a glimpse of blue sky for eastern and central parts," said MetService Meteorologist Emma Blades.
In the last five days, Wellington recorded a just 2.1 hours of sunshine.
Still the weather will be a bit better for the start of school holidays this weekend.
"Compared to what we had for most of this week it's not too bad a start to the school holidays," Ms Blades said.
An area of high pressure starts to spread over the South Island on Saturday, bringing settled weather.
"The best spots weather-wise will be the west and the far south, which is good news for Timaru, who will be celebrating their long anniversary weekend," she said.