Fog is affecting Aucklanders' morning commute and delaying some flights at Auckland Airport.
About 30 domestic regional flights have been cancelled and 35 delayed, and Auckland International Airport was earlier warning passengers to expect further delays.
One service to and from Wellington is among those delayed and a flight from Blenheim was diverted to Rotorua.
International flights have not been affected.
People are urged to check their flight details before they leave home.
Got to love a foggy start in Auckland: The Waitemata looking pretty earlier this morning, prior to the fog pushing across. ^GG pic.twitter.com/qunKAQhviE— MetService (@MetService) June 12, 2019
The Transport Agency is warning drivers to take care as fog and low cloud reduces visibility on the motorways.
A multi-vehicle crash earlier blocked southbound lanes of the Southwestern Motorway, near the Dominion Rd on-ramp, and motorists were being advised to use alternative routes if possible.
SH20 SOUTHWESTERN MWY, SOUTHBOUND - 6:50AM— NZTA Akld & Nthlnd (@NZTAAkl) June 12, 2019
A multi-vehicle crash is blocking southbound lanes near the Dominion Rd on-ramp. Pass with extra care & expect delays. ^TP pic.twitter.com/tOc6Mwl4NA
Queenstown flight delays
Heavy fog also blanketed Queenstown Lakes District disrupting morning flights at the town's airport.
Several flights were delayed or cancelled.