A yellow weather warning has been issued, with sub-zero temperatures expected to lead to a risk of ice in places.
The warning came into effect at 4pm today, November 12, and is in place until 8am tomorrow.
The Met Office says temperatures will fall “rather quickly” from sunset, causing temperatures to drop below zero this evening and stay there until morning.
“With recent dry conditions and low humidity air, hoar frost should be limited for most places but still a risk,” it says.
“There is also a small risk of isolated showers later tonight and at first in the morning, which will bring a risk of ice in any places that have been made damp from showers.
“Spot treatment of road surfaces may need to be required.”
The places most at risk will be the Mountain Road and Central Valley.