A final decision for this afternoon's crossings will be made by 1pm
This morning's (8am) Manxman sailing to Heysham and its return leg (1:45pm) have been cancelled due to forecast adverse weather.
Strong winds are developing across the North Irish Sea with the occasional gale.
This afternoon's round trip to Liverpool remains at risk.
A final decision for the 3pm Manannan sailing, and its return (7:15pm), will be made by 1pm.
The Steam Packet Company says bookings can be amended online via its website, or alternatively you can contact the reservations team on 01624 661661 or 08722 992 992 to make alternative arrangements.
It apologises for any inconvenience caused.
"Halfway Horse Tram" not the only problem on the prom, says council leader
Emergency services tackle fire at Peel Golf Course
Report calls for Visit Isle of Man to be established as a statutory tourism board