The rain - courtesy of a front working it's way up the North Island - is expected to be short lived as the front continues its journey north.
A front working it's way up the North Island tomorrow will bring some showers to the east, before heading to the top of the island on Tuesday evening.
It will bring rain to the west of the North Island, spreading to the west as it moves northwards.
Southwest winds trailing behind the front will perhaps bring cooler overnight temperatures with it, but nothing unusual for this time of year, Farmer said.
Auckland will drop down to 14C overnight on Tuesday.
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Wellingtonians will awake to early morning rain on Tuesday, later clearing to fine spells with southerly winds.
A high of 17C is expected in the capitol tomorrow, Farmer said.
The pick of the country today was the South Island - with a balmy 25C recorded in Ashburton and 24C in Christchurch on Monday.
But milder 16C is expected in the two on Tuesday, Farmer said.
The South Island will see fairly fine weather on Wednesday, with a few morning showers across Fiordland, and clear skies through the Canterbury high country.
Come Thursday, the skies will darken, with most of New Zealand - particularly the west coast - was expected to be hit with gale-force winds due to a "very low pressure" edging closer from the Southern Ocean.
WeatherWatch forecasters say by Sunday evening gusts could reach over 120km/h in some exposed places, "possibly even over 150km/h in some very extreme exposed areas in the south" - so you might as well stay home.
While Prime Minister Jacinda Ardern has assured Kiwi kids the Easter Bunny was still in operation during the lockdown, encouraging kids to pop egg artworks in their windows, kids out on an egg hunt may need to don their gumboots and raincoats.
In the Pacific, mammoth Cyclone Harold has torn through the Vanuatu Islands, with winds up to 200km/h close to its centre, Farmer said.
Harold, now tracking towards Fiji, is expected to slowly weaken to a category four cyclone on Wednesday.
Heavy rain, flooding, large waves and storm to hurricane-force winds are expected to affect parts of Fiji, the Metservice website said.
It is expected to continue moving east-southeast and pass close to southern Tonga as a category 3 cyclone on Thursday, then move out of the tropics late Thursday or early Friday.
