It's a day of two halves weather-wise with sunshine and scorching temperatures in some spots around the country while others are hit by thunderstorms.
A heatwave caused by a high hanging around to the east of the country is expected to bring a high of 26C in Alexandra and temperatures around 22C to Christchurch and Wanaka.
But as the high started to shift away, hot, wet conditions increased the likelihood of thunderstorms over inland spots like Otago as well as the bottom of the North Island.
MetService meteorologist April Clark said storms were fairly common in these kind of conditions.
"Sea breezes kick in and come together to create drafts. These drafts rise, then turn into storms for areas inland."
Clark said the chance of stormy weather would likely disappear by the end of the week along with the heatwave.
The start of the week brought near-record high temperatures for southern spots like Invercargill, which sweltered at 25.4C on Monday.
While most of the South Island has enjoyed warmer temperatures this week, the wave of summery weather didn't quite make it to north islanders.
Temperatures over most of the island sit in the high teens today, reaching up to 20C in some lucky spots.
According to Niwa, a deep low over the western Tasman sea would make its way toward New Zealand by the end of the week, bringing wet weather.
This would affect the North Island and South Island alike.