Weather Impact: Rain and Warm Temperatures Predicted for Final Winter Week

Weather conditions indicate a series of fast-moving weather systems will bring rain and "blustery" westerlies across New Zealand during the final week of winter, according to MetService.

Westerlies are expected to contribute to warmer days on the eastern side of the country.

Heavy rain has already caused chaos in the lower North Island, causing flooding and slips in the Wellington region. A rainy weather system continues to linger over central New Zealand, prompting heavy rain watches and warnings.

MetService meteorologist Mmathapelo Makgabutlane noted that the rain isn't finished yet for saturated areas of Wellington and Kapiti.

"Within the ongoing period of rain, bursts of intense falls may occur, potentially leading to further impacts," she mentioned in a media release.

In the coming days, westerlies are forecasted to deliver heavy rain, especially in western South Island alongside elevated parts of the North Island.

"The area from Fiordland to Tasman will see minimal respite as weather systems cycle through, providing soils limited time to dry out before the next wave arrives."

A heavy rain watch is set for Buller on Tuesday, with additional rain expected for other areas later this week, as stated by MetService.

The forecaster indicated that breezy westerlies would become a noted feature as New Zealand enters its windiest season.

"Many regions, particularly in the South Island and eastern/lower North Island, will likely experience breezy weather," Makgabutlane indicated.

"Be sure to secure loose items to prevent them from being displaced into neighbor's yards!"

Westerlies are anticipated to also introduce warmer temperatures in the east, with certain areas expected to reach upper teens, possibly topping 20°C.

"Napier could experience the longest stretch of August days at or above 20°C," she added.

Warmer weather seems poised to extend into the night, with double-digit minimums expected in both islands.