The Ben-my-Chree's overnight sailings have been cancelled as a result of forecast bad weather.
This evening's 8.30pm Douglas departure and return from Heysham early tomorrow morning have been called off.
The rest of Saturday's journeys are also subject to possible disruption - a final decision will be made by 7am tomorrow morning.
Tin bath races mean bus diversions tomorrow
MHK wants backing for changes to Tynwald members' pay
Storage firm announces closure
Mountain Road shut for skate setup later
Bus diversions for tin bath day tomorrow
MP criticises Island's fishing visa rules in Westminster
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Strix to shut Ramsey factory