Warmer temperatures are set to hit the country, but the weather is also going to get wetter with warnings in place for parts of the South Island.
While election day on Saturday was fine for most, the next few days were expected to bring wet, windy weather along with high temperatures.
The heat and rain were forecast to hit the South Island on Sunday and move north on Monday.
"It actually starts tomorrow, just bringing warmer air from the north but as it comes over from Australia it picks up moisture from the Tasman,'' MetService meteorologist April Clark said.
MetService has issued a heavy rain warning for the West Coast of the South Island and a strong wind warning for Canterbury.
"You can still have hot weather and rain although it can seem like an oxymoron. It's quite normal for the weather to be quite unsettled in spring,'' Ms Clark said.
The severe weather warnings take effect from Sunday evening, with rough weather expected to dissipate on Monday.
Watches were also issued for heavy rain in the Otago headwaters and strong wind forecast for Fiordland, Southland, Stewart Island and Otago from Sunday afternoon.
Strong wind watches were also issued for Marlborough, Wellington and Wairarapa from the early hours of Monday morning.
The watches could be upgraded to a warning on Sunday.
The rain and gales were expected to be accompanied by warm temperatures, with a high of 21degC expected in Dunedin and Christchurch on Sunday, 20degC in a windy Queenstown, and a showery 21degC in Invercargill.
As a heatwave moves over from across the Tasman, it would pick up moisture from the Tasman Sea, Ms Clark said. This would result in temperatures much lower than Australia has been experiencing, but much warmer than last week.
The highest temperatures were expected to be 24degCin Blenheim on Sunday and 25degC in Napier and Hastings on Monday.
Ms Clark said the high temperatures would be fairly short-lived, not lasting the required five days to be considered a heatwave.