Frosty conditions are hanging around this weekend, with snow still covering parts of the South Island today

Some residents woke up this morning with no power amid near sub-zero temperatures and up to a metre of snow.

Three South Island highways still remain closed, with NZTA crews working to open the roads later today.

All Cook Strait ferries are cancelled today, with up to ten metre swells recorded.

MetService Forecaster Gerrard Bellam, says the weather will be at its coldest tonight.

He says Twizel could reach minus seven degrees, while Auckland City will likely be in for its first frost with Whenuapai Airbase having a minimum forecast of one degree.