Waka Kotahi is advising those affected by the wintery blast to be extra careful.
In Wellington, listeners have been texting in saying there are snow flurries affecting Transmission Gully.. People in Christchurch are also reporting snow falling.
Helen Harris is the National Journey Manager and says the snow down South has closed some important motorways. It's a sea of white through the streets of Dunedin where drivers are being asked to take care.
Reporter Tim Brown spoke to Susie Ferguson.
