A return Interislander sailing has been cancelled because of swells of up to five metres expected to batter Cook Strait tomorrow morning.
KiwiRail said it cancelled the Aratere's 6.45am sailing from Wellington and 10.45am return sailing from Picton.
A spokesperson said another ferry would make an extra return sailing tomorrow carrying freight and rail cargo.
She said the cancellation was not in any way due to the Aratere's condition or ability.