Fog has delayed flights at Dunedin Airport this morning.
An airport spokeswoman said fog delayed planes leaving and arriving at the airport.
The delayed flights to Christchurch and Brisbane were expected to depart before 9.30am, she said.
A flight scheduled to arrive from Christchurch at 7.50am had been diverted.
Further north, sea fog is causing major disruptions at Wellington Airport as an "active low" works its way south bringing a swathe of weather warnings across the North Island.
