Sailings tonight and tomorrow could be disrupted by a 'rapid deterioration' in the weather.
The Steam Packet Company says the Douglas to Heysham crossing at 7.45pm could be off.
A final decision will be taken by the master at 6.30pm.
The return journey, at 2.15am tomorrow morning, is also at risk.
Steam Packet sailings delayed tonight
PPE Medpro put into liquidation
Part of TT course closed tomorrow
Carl Cox backs cancer charity's TT fundraising auction
Business appeal over thousands in unpaid bills
Pharmacy plans for former IOM Bank
Appeal after wood from van damages car
Island part of union data breach investigation