Early morning ferry sailings across the Cook Strait have been hit by delays and cancellations.

The Arahua sailing from Piction due to leave at 6.30am will not leave until an hour later at 7.30am.

The Kaitaki due to leave Wellington at 8.30am will stay on time.

However, the Piction sailing at 10.45am has been cancelled.

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The sailings have been affected due to forecast rough seas in Cook Strait.