Condor Ferries will continue to only operate to and from Poole while engineers assess the ferry berth in Weymouth.
Sailings from the Channel Islands to the UK will continue to be relocated to Poole until Monday 27 February while investigations are carried out on the berth.
Sailings were moved for the weekend after concerns about the berth’s structural integrity were raised last week.
Condor Ferries said it would contact affected passengers and was offering help in changing travel plans.
Captain Fran Collins, operations director, said: “We have taken the decision to move all sailings to Poole for a further week to give our customers as much notice as possible while investigations are undertaken into the condition of the berth in Weymouth.
“Condor Ferries and Weymouth and Portland Borough Council are committed to working in close cooperation during the investigations.”
