Across the region people sought relief from the sweltering sun, at beaches, lakes and waterways .
MetService meteorologist Angus Hines said high pressure over the country was suppressing cloud formation, resulting in long sunshine hours.
The MetService reminded those outside in the sunshine to stay sun smart and to "slip, slop, slap and wrap".
Today, the South is expecting a break from the sun and temperatures should be more tolerable, Mr Hines said.
"We get a cooler wind change coming across most of the South, and that’s likely to bring a few showers through."
New Year’s Day is "still shaping up to be a good one", Mr Hines said.
Hot in the South
Alexandra 29.3°C
Balclutha 29°C
Cromwell 28°C
Dunedin 25°C
Gore 26°C
Invercargill 25°C
Mosgiel 31°C
Naseby 26°C
Oamaru 29°C
Queenstown 24.5°C
Ranfurly 27°C
Timaru 26.8°C
Wanaka 26.1°C