Wet weather and gale-force winds are wreaking havoc across Auckland and the north, closing roads, felling trees, flooding properties and causing power cuts.

Downpours hit the north early this morning bringing 34.5mm/h to some Auckland suburbs while easterly gusts reached up to 113km/h in the Hauraki Gulf.

Albany recorded 31.3mm of rain between 7am and 8am today - the third-wettest hour since records for that area began almost nine years ago, according to Niwa.

The Coromandel ranges experienced persistent rain with a 20-hour accumulation of 107.5mm recorded since 7pm yesterday.

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The heavy rain brought plenty of surface flooding to low-lying areas, causing disruptions on some of Auckland's busiest roads.

Motorists were delayed on the Northern Motorway with the brief closures of Oteha Valley Rd on-ramp and two of its lanes in Rosedale.

The Oteha Valley Rd southbound on-ramp to the Northern Motorway has reopened after it was closed this morning due to flooding. Photo / Brett Phibbs
The Oteha Valley Rd southbound on-ramp to the Northern Motorway has reopened after it was closed this morning due to flooding. Photo / Brett Phibbs

Tāmaki Drive has also reopened after being closed around high tide.

Meanwhile those on SH1 in Warkworth are still facing major delays due to a car hitting a power pole.

Two state highways closures occurred this morning in Waikato.

Flooding at Goldfields Rd closed SH25 and a fallen tree blocked traffic in both directions on SH28, Whites Rd.

Contractors have now opened SH28 with a stop-go system in place but NZTA still warns of delays.

Northlanders, Aucklanders and those along the coast in the Bay of Plenty were warned to watch out for flooding as rain and high winds coincide with a king tide this morning and again this evening.

High tide in Auckland this morning was at 8.53am. The next high tide is at 9.19pm.

Damaging gusts of 130km/h were expected in Coromandel Peninsula, Bay of Plenty from Whakatane westwards, and Waikato according to MetService.

Northeast gales of 110 km/h were expected in exposed places in Auckland and Great Barrier Island.

Heavy rain warnings remain in place for Auckland, Coromandel, Bay of Plenty west of Maketu and for Gisborne from Tolaga Bay northwards according to MetService.

NZTA warned it might have to close the Waioeka Gorge today at 3pm as a safety precaution due to severe weather on (SH2) between Opotiki and Gisborne.

The Severe Weather Warnings for both heavy rain and severe easterly gales in Northland had been lifted as the front has passed through.

Early this morning, Northern Fire Communications shift manager Daniel Nicholson told the Herald they had attended 15 callouts in about an hour and half this morning, and that flooding was affecting houses.

A tree had fallen through a house in Whangaparaoa in the North Shore, Nicholson said.

"Nobody was injured but the house was severely damaged," he said.

The callouts had been steady since 7am but they were not unmanageable, he said.

"We are just sitting by, waiting to see what happens with the king tide."

The owners of the house told Stuff the tree came down during torrential rain and had crashed into their home of 18 years.

The owner's grandson told Stuff the noise "woke me up in an instant".

"It's an absolutely huge tree."

Toppling trees and fierce winds were causing small power blackouts.

Auckland residents in Onehunga, in the area surrounding Neilson and Victoria Sts, are currently without power, Vector reports.

About 310 properties in the Bay of Plenty, meanwhile, were also without power.

Electricity provider Powerco reports it may take hours to restore power to the homes.

NZTA warned debris was expected on many main roads in the South Island this coming week between periods of high seas.

MetService meteorologist Andrew James said exposed north-eastern areas were expected to bear the brunt of it today and could expect big rainfall numbers.

"That rain and those gale easterlies are going to continue this morning and into the afternoon."

Later this afternoon, the rain would ease to isolated showers as the winds turned north-west, he said.

The band of rain was moving south, and would affect the rest of the north island as it progressed.

"Most of it will be easing overnight tonight."

It could be a wet and miserable week.

Aucklanders can expect showers tomorrow with northerlies turning westerly in the afternoon.

The showers and westerlies were expected to continue in Auckland on Tuesday and Wednesday.


Today's main centre forecasts
Whangarei
Rain, with heavy falls, easing to a few showers late morning as strong easterlies change lighter northerly. Chance thunderstorm. High 17C low 9C

Auckland
Rain, heavy and possibly thundery, with easterly gales, gusting 120 km​/​h. Rain and winds easing towards evening. High 16C low 10C

Hamilton
Rain developing morning, possibly heavy, as easterlies become strong. Rain easing evening as winds change lighter northerly. High 15C low 8C

Tauranga
Showers turning to rain morning, with heavy falls, as easterlies become strong. Possible evening thunderstorms. Weather easing overnight. High 16C low 9C

Wellington
A fine day, then cloud increasing and some evening rain. Light winds. High 15C low 10C

Christchurch
Cloud increasing. Chance shower, then more likely from evening. Northeasterlies becoming strong. High 13C low 8C

Dunedin
A few showers developing morning and becoming more frequent evening. Strong, gusty northeasterlies. High 11C low 10C