The first weeks of October are expected to bring sunshine and warm oceans across the country - but while some regions might welcome the sun, drought-stricken places like Auckland will be dreading the drier-than-average conditions.
A high pressure front will move across the country on Friday giving Kiwis high temperatures and dry conditions.
"Air temperatures are very likely to be above average in all regions of New Zealand and high temperature extremes will have an elevated chance of occurring," said NIWA in a statement on Thursday.
The high pressure will warm the sea and air with a higher chance of temperature extremes in all regions of New Zealand.
Weatherwatch reports many regions will remain dry for the first half of October - bad news for New Zealand's largest city.
"The downside with weather like this for places like Auckland with the water shortage is that you don't want to see giant highs like this," said Weatherwatch forecaster Philip Duncan.
"Soil moisture levels and river flows are most likely to be below normal in the north of the North Island and the east of the South Island," said Niwa.
However, the formation of La Niña in the Pacific Ocean could bring a respite.
La Niña is a complex weather system caused by strong wind blowing warm water at the ocean's surface from South America and across the Pacific Ocean. It can bring large lows and subtropical storms, but it's unclear whether New Zealand will be hit by it's effects.
Towards the middle of October, a large low pressure front could be a potential "rainmaker" across the North Island, says Duncan.
"A bit of a sign of La Niña to see this low pressure up here, which is a good sign if we need rain up to the north but whether that event is the big cure in Auckland and surrounding regions, we're not quite sure just yet."