Temperatures in the North Island will reach into the low 20s today but central parts of the country will face wind and bands of rain through the day.
It comes ahead of heavy rain and gale-strength winds predicted for the weekend.
A complex low-pressure system covering the North Island and Tasman Sea was directing moist easterly flow and rain across central New Zealand today, MetService said.
The flow was expected to tend southerly through the day and ease the rain over central areas.
A heavy rain watch was in place for Gisborne north of the city and Canterbury north of the Waimakariri River.
There was also a low risk of thunderstorms about Gisborne this morning.
Looking ahead, a ridge of high pressure would cover much of the country on Thursday.
Record breaking heat in Queensland - where is it heading? 🌡️— NIWA Weather (@NiwaWeather) November 27, 2018
Some of the warmth crosses the Tasman & reaches NZ, but not nearly as extreme as Australia. pic.twitter.com/0kEPI3svh6
This would be followed by a complex low-pressure system that was expected to move on to New Zealand from the Tasman Sea over Friday and Saturday.
The complex low would bring rain and strong northeast winds in many places.
"There is low confidence of northeasterly winds approaching severe gale strength in exposed places of Northland, Auckland, Coromandel Peninsula and Waikato from late Friday to Saturday."
There was also low confidence rain accumulations would reach warning amounts in Northland and Auckland, and the western ranges of Nelson on Saturday.
"There is moderate confidence that rainfall accumulations will reach warning amounts in Coromandel Peninsula, Bay of Plenty and about East Cape during Saturday and Sunday."
Yesterday MetService said there were around 800 lightning strikes in New Zealand, with most of them occurring in Hawke's Bay, Gisborne and Northland.
Around 800 lightning strikes in NZ region today, with most of them occurring in Hawkes Bay, Gisborne & Northland. A weather station in Gisborne ranges recorded 25mm between 4-5pm, while 18mm fell in Papakura in same period. https://t.co/BZWb7ZPiRd ^PL pic.twitter.com/ZHan8e1fPJ— MetService (@MetService) November 27, 2018