Residents in Auckland and the surrounding areas are being told to brace for more heavy rain, flooding and gale-force winds, and some homes are being evacuated, as Cyclone Gabrielle nears New Zealand's coast.

Gabrielle, is currently sitting 200 kilometres north-east of Auckland, and is forecast to move close to the east coast over the next 24 hours.

"We expect the impacts of Cyclone Gabrielle to get, unfortunately, worse before they get better," Rachel Kelleher, Deputy Controller of Auckland Emergency Management, said.

"It's not the time to be complacent."

The cyclone is the second significant weather event to hit Auckland and the upper North Island in just a few weeks.

Last month Auckland and surrounding areas were hit by record rainfall that sparked floods and killed four people.

New Zealand Prime Minister Chris Hipkins has announced a $NZ11.5 million ($10.5 million) package to support community groups, such as food banks, impacted by the floods.

On Monday, many schools and local government facilities across Auckland and the upper North Island were closed with people urged to avoid travel if possible.

States of emergency were in place in Auckland and at least six other regions. Around 50 apartments in Auckland have been evacuated because of fears a century-old steel-framed tower could collapse.

Further evacuations have been ordered at beachside communities on the east coast ahead of an expected storm surge in the early hours of Tuesday morning.

Electricity is out for 46,000 homes, mobile phone service is patchy in some areas and trees have come down and roofs lifted off.

Public transport has been disrupted with ferries, buses and trains either suspended or operating on a reduced schedule.

Air New Zealand has cancelled 509 flights and said flights would resume on Tuesday when the weather is expected to improve.

Search on for missing boatie

Police are trying to locate a person who was onboard a boat near Great Barrier Island this morning, after responding to reports the boat was in distress.

"The Police Maritime Unit, with assistance from Eagle, have attempted to approach the boat throughout the morning, however conditions have been challenging, and at this stage no one has been located," they said in a statement.

Metservice meteorologist, Georgina Griffiths, said overnight that Auckland and Great Barrier Island could see heavy rain and winds.

"Storm surge is still coming and might peak with the high tide at 2am for eastern parts of Auckland."

She added that Auckland was already saturated, meaning some localised landslides and surface flooding was expected.

Reuters