New Zealand can expect “above average temperatures” and “less frequent” cold snaps across all regions this winter, according to NIWA’s seasonal climate outlook.
The outlook released today, which covers June to August 2025 said: “Seasonal air temperatures are expected to be above average across all New Zealand regions for this winter season.”
“Thus, while cold snaps and frost will occur, they are expected to be less frequent than usual.”
NIWA principal scientist Chris Brandolino said rainfall totals during the three months ahead were expected to be “above normal for the north of the North Island and near normal for the east of the South Island”.
“For all remaining regions of the country, rainfall is forecast to be near normal or above normal,” he said.
Brandolino also said the east of the country could expect “higher than normal atmospheric pressure”.
“Leading to north-easterly flow anomalies that may shift to a more north-westerly direction towards the end of the three-month period.
See 1News weather expert Daniel Corbett’s explanation of the weather we can expect to see over the next few months on 1News.co.nz and TVNZ+ on Sunday – the first day of winter.
“Low pressure systems forming north of the country are still expected to affect New Zealand and may lead to heightened risks for heavy rainfall events,” he said.
Also during this period, near normal soil moisture levels and river flows are expected for all regions of the North Island, while near normal or above normal soil moisture levels and river flows are forecast for the South Island.
