A fine few days are in store for most of the country before a Tasman tempest arrives Friday to spoil the weekend plans.
A ridge of high pressure has spread from the North Island across the South Island, kicking out a front that brought strong winds and a severe drop in temperatures yesterday.
Fine and warm conditions were forecast across most of the North Island today, MetService duty forecaster Mickey Malivuk said.
Auckland is in for another cracking day and a high of 20C. Tauranga looks to be the pick of the bunch though, with a high of 22C forecast.
The South Island is joining the fine weather party too, enjoying temperatures in the late teens to 20C, and fine weather forecast in most areas.
The settled conditions bring a change from yesterday, when a quick cold snap brought gusty winds, thunderstorms and a rapid drop in the mercury.
Temperatures near Invercargill dropped more than 8C in just 50 minutes yesterday afternoon.
The front brought over 300 lightning strikes in a two-hour period a wind gust of 210km/h was recorded in the mountains at the Mid Dome station.
On the flats, winds in Gore got to 110km/h, and 90km/h in Invercargill and Queenstown.
Those same wind gusts are behind a "rare" southern ocean swell lashing the bottom of the South Island.
The swell was peaking this morning, when waves will reach heights of 8-9m around the coasts of Southland and Fiordland.
"Those areas are used to big waves, but this is pretty rare," Malivuk said.
In the open ocean, waves could be double the height double of those on the coast, he said.
The swell was forecast to head southwest today, banging head on into the Chatham Islands.
Fine weather is forecast across New Zealand tomorrow before a low developing in the Tasman Sea arrives in the South Island Friday morning bringing rain, and moving over the North Island in the evening.
Most areas will get rain from Friday across the weekend, some heavy.
"Western areas of both islands will experience the worst, but it is hard to pinpoint exactly where at this stage," Malivuk said.
Up to 100mm could fall in 24 hours in northwest Nelson from Friday through to Sunday and in Westland on Friday, possibly triggering warnings.
Rain could also get heavy about Nelson, Buller and northern Marlborough on Saturday and Sunday, and Westland on Sunday.
On Sunday in the North Island, Mt Taranaki, the Tararua Range and Gisborne ranges could get heavy rain.
Fine. Southwesterly breezes. 21C high, 10C overnight.
Auckland Fine, apart from isolated morning showers. Southwesterly breezes. 20C high, 11C overnight.
Hamilton Some morning cloud otherwise fine. Southwesterly breezes. 21C high, 8C overnight.
Tauranga Fine, could get some morning cloud. Southwesterlies dying away. 22C high, 11C overnight.
New Plymouth Morning cloud then fine from afternoon. Westerly breezes. 19C high, 9C overnight.
Napier Fine, some high cloud at first this morning. Westerlies dying out by midday. 21C high, 8C overnight.
Wellington Fine, some morning high cloud. Northerlies easing in the morning. 18C high, 12C overnight.
Nelson Fine. Light winds. 20C high, 8C overnight.
Christchurch Fine. Light winds this morning. Northeasterlies by evening. 17C high, 4C overnight.
Dunedin Fine. Westerlies dying away and northeasterlies developing this evening. 17C high, 7C overnight.