22 Sep 2025

Weather: Heavy downpours moving in on lower North Island, 220mm forecast for Taranaki

3:14 pm on 22 September 2025
State Highway 6, between Lower Buller Gorge and Punakaiki, was closed overnight because of a slip.

State Highway 6, between Lower Buller Gorge and Punakaiki, was closed overnight because of a slip. Photo: Supplied/NZTA

More wild weather is expected in some parts of the country, with heavy rain moving up the North Island.

Up to 220mm of rain is expected at Taranaki Maunga, while the Tararua ranges may get up to 160 millimetres of rain.

Taranaki and the Tararua ranges are both under an orange heavy rain warning until early Tuesday morning.

Heavy downpours are also expected around the Kapiti Coast on Monday, with about 11 millimetres falling in Paraparaumu in an hour this morning.

Severe gales rattled both Wellington and Marlborough overnight with gusts peaking at 133 km/h at Mount Kaukau.

Wellington, Wairarapa south of Greytown and the Marlborough Sounds all remain under a strong orange wind warning.

Firefighters responded to one weather-related callout when a tree was uprooted at a property in Eketahuna.

MetService Meteorologist Mmathapelo Makgabutlane told Midday Report the bulk of the wet weather was now in the North Island.

She said some areas had already received upwards of 100mm.

"But for the rest of the Island as the evening goes on, especially places like Northland and eventually Auckland, we do see the rain start to reach those areas.

"Definitely some wetter periods and the North Island, I'd say Tuesday and Wednesday, are looking like the wettest of those days."

She said there would be some gaps in the bad weather to make the most of the school holidays, but mostly in Canterbury.

Sign outside of Methven, blown across the road on Wednesday

Sign outside of Methven that was blown across the road. Photo: RNZ/Nathan Mckinnon

The wild weather comes after a severe red wind warning was issued for the Canterbury region, with much of the South Island also under weather warnings.

Hundreds lost power, trees and lampposts were blown over, and people were asked to stay at home.

A major highway along the South Island's West Coast also remains shut due to a slip.

State Highway 6, between Lower Buller Gorge and Punakaiki, closed overnight.

It is one of a series of slips around the mainland following wild weather, the New Zealand Transport Agency (NZTA) said.

Motorists are asked to detour via inland routes, including State Highway 6 from Lower Buller Gorge onto State Highway 69 and State Highway 7 from Reefton, then returning onto State Highway 6 in Greymouth.

An NZTA spokesperson said the detours would add about 90 minutes to the journey time of motorists.

"Crews will be working to clear the SH6 slip and an update will be provided when the road status changes."

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