Fog restrictions at Auckland Airport have been lifted after weather led to cancellation or delay of about 65 flights.
Fog restrictions were put in place from about 7.30am to 11.20am.
About 35 domestic flights were cancelled and 30 delayed.
International flights and those to Wellington, Christchurch, Dunedin and Queenstown were not affected.
Metservice forecaster Claire Flynn said the clear skies and cool temperatures were creating the fog.
A ridge of high pressure over #NZ has meant clear skies overnight, bringing fog/frosts to many places. #Waiouru was the coldest spot with -7.3C & even #Auckland got down to -1C in some parts (see photo below taken by Georgina Griffiths). Your forecast: https://t.co/hnwmGxU1gR ^CF pic.twitter.com/yrhkCTK3ev— MetService (@MetService) June 29, 2018
It was only expected to be temporary, she said.
"I can see there's still some fog there at the moment, but as the sun comes up and it starts to warm up, it will dissipate reasonably quickly."
Ms Flynn said Hamilton and Dunedin also had fog.
It's been a disruptive week for travellers at Auckland Airport and the flow-on delays to other regional airports because of the fog.
On Thursday, there was a security breach at the airport which caused long delays for passengers who had to be re-screened.
The airport was unable to confirm why a passenger jumped the security barrier.