Intense winds hitting speeds of approximately 155km/h (96mph) have resulted in approximately 90,000 properties without power and forced officials to call off over 100 aircraft departures, based on local media.
The winds are impacting the whole southern region and lower areas of the North Island, according to the weather forecasting body.
New Zealand authorities have announced infrequent severe gust advisories - the top caution category - in key areas such as these major districts.
Locals have been encouraged to stay indoors, stay off roads, and get ready for additional electricity and network failures.
The power cut is primarily influencing households predominantly in the southern region, though authorities report that power was being restored progressively.
Domestic outlets have indicated that in various locations structures have suffered roof damage, and power lines and trees have been toppled by the winds.
Across Wellington, a person was killed after being hit by a wooden fragment at a well-known hiking path on earlier this week.
Additionally in the city, a female was blown onto oncoming traffic on a street by a strong gust of wind, in a incident that was captured in a popular vehicle recording.
Air travel to and from the city have been cancelled due to the weather, and certain highways and community centers are also closed.
Meanwhile authorities in Canterbury have announced a crisis declaration, to support emergency management operations.
These intense gusts on this day coincide with tens of thousands of school staff, physicians and civil servants take part in what has been described as a "mega strike", requesting improved salaries and workplace environments.
But the severe conditions has pressured them to alter some of their plans, with several external protests shifted to interior venues or cancelled.
Comparable winds are impacting the neighboring country, causing a heatwave to the remote areas.
Agencies have issued burning restrictions for apprehension regarding forest fires.
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