At 2pm the MetService rain radar showed rain falling on the top of the country and bearing down on Auckland.
MetService meteorologist Alana Burrows told the Herald a series of fronts will push northwards across the country, bringing yesterday’s wet weather up the South Island and across the North Island.
Heavy falls are expected to hit Northland, Taranaki and Wellington, then push up the country from late tomorrow morning and move northeastwards throughout the afternoon.
“For the North Island, we’ve got a moderate risk of thunderstorms, with heavy rain and strong wind gusts up to 90km/h through the afternoon and evening for the areas north of Waikato,” Burrows said.
Northland, Auckland and the Coromandel are most at risk of storms, with rainfalls of 25-40mm possible.
A heavy rain watch is in place for the Bay of Plenty to the east of Whakatāne from 7pm, with a risk the rainfall might upgrade to a warning near the ranges.
The South Island won’t escape the wet weather, with bands of rain falling from Nelson down the Southern Alps, on the West Coast and Fiordland, and thunderstorms possible in the lower regions.
“We’ve got a moderate-risk area for the South Island, Fiordland up to the glaciers in Westland in the morning, and then the moderate-risk area pushes eastwards into the afternoon and evening for North Otago, Dunedin, Southland and Clutha,” Burrows said.
Southland, Clutha and Dunedin should expect some showers across the day, while the eastern ranges of the Canterbury Plains and Christchurch will have mostly fine weather.
On the weekend, the unsettled outlook will continue, with the North set to be the wetter of the two islands as a complex low-pressure system arrives from the tropics.
“That could bring quite a lot of wet weather for the North Island, a bit more settled for the South Island, but, as we push into Tuesday, some of the rain might start to affect the eastern coasts of the South Island with that low-pressure system.”
Lower temperatures could also take hold in the South Island next week, hitting below average in some places.
Looking into next week, those going away for the New Year should prepare for changeable conditions.
While the West Coast of the South Island might be having an unexpectedly fine start to 2026, the rest of the country faces erratic forecasts.
“It’s still quite uncertain, to be honest, as we head to New Year’s Eve and New Year’s Day,” Burrows said. “It just depends how that low-pressure system tracks.”
