High-speed Condor sailings between St Malo and Jersey this weekend (12th and 13th January) have been cancelled.
It's because of predicted stormy weather around the French port, with wind speeds of 30mph expected.
Alternative sailings are being offered to passengers where space is available. All are being offered free transfers or a full refund.
The affected journeys are the 09:05 departure from Jersey to St Malo, the 18:15 from St Malo and 19:30 return and the round trip on Sunday, scheduled to leave at 18:30 from the French port and return from St Helier at 19:35.
Further disruption is expected on Monday, when scheduled sailings have been combined and rerouted via Guernsey because local Immigration officers will be on strike.

Plans to charge wealthiest patients for medical travel
Railway Walk reopens 'several weeks' ahead of schedule
New bar opening at former Rojo and X site to evolve Jersey's nightlife
Former Chief Minister seeks re-election
Château Vermont to become home to new music campus
St Saviour break and entry suspect pictured posing on motorbike
'Overstretched' neurology department following under-experienced managers
Channel Islanders asked to report injured or dead seabirds