"There has been overnight rain in the lower North Island causing roads to be slippery with some minor surface flooding.
"There is low mist in Wellington at present meaning limited visibility."
Police have received reports of high winds on the Desert Road stretch of State Highway 1 in the central North Island. Drivers were urged to drive to the conditions.
A handful of flights into and out of Wellington were cancelled or delayed yesterday morning after low cloud rolled into the city.
By midday, the low cloud had lifted and planes were able to fly in and out again, an airport spokesman said.