Temperatures in the South Island's interior could hit near-record highs as Australia lends some of its warm weather to the region, forecasters say.
The National Institute of Water and Atmospheric Research is tipping temperatures to climb into the high-20s in inland Otago, Southland and Canterbury on Thursday and Friday.
It means locals could be set to enjoy days up to 15C higher than average for this time of year.
"There is a chance that the country will observe its first 30C temperature of the spring, which would be the first 30C temperature since April," NIWA forecaster Ben Noll said.
Current record maximum temperatures across these regions stand in the mid-to-high 20s.
The weather driving the possible record temperatures is a high pressure system set to flow out of Australia across the Tasman Sea on Thursday.
It is expected to also bring warm weather to the upper South Island, including northern Canterbury, Tasman and Marlborough, NIWA said.
For North Islanders, the warm weather will be slower to arrive with Thursday expected to be "seasonably cold" before the island's lower districts gently warm up on Friday.
Sadly the record warm spell also won't be sticking around for the Labour Day long weekend with a front expected to bring clouds and showers to much of the South Island on Saturday, NIWA said.
This may then move onto the North Island from Saturday into Sunday, bringing clouds and showers before average temperatures for the season are expected on Monday.