The majority of Friday's sailings are subject to disruption or cancellation, due to forecast poor weather.
The Steam Packet says its 8.45am sailing to Heysham, its return - alongside the 3pm departure to Liverpool - including its return could all be affected.
Further, Friday evening's voyage to Liverpool could also be called off.
A further update is expected by Friday morning.

Repairs on Peel Power Station to get underway
Manx Care doctor survey to be discussed by Tynwald
Weather warning for snow tonight
MHK queries safety at primary school in Ballabeg
Gales put two ferry sailings at risk tonight
Should the Island throw a birthday party for Barry Gibb?
Warning issued over icy roads
High ground could see 4 inches of snow on Saturday night