Decision due by 7am on Tuesday
Tuesday morning's Ben-my-Chree sailing to Heysham and its afternoon return are subject to delay or cancellation.
That's because of the shipping forecast for the Irish Sea, which says winds could reach gale force eight for a time in the morning.
A decision is due to be made by the Steam Packet by 7am.

VAT reduction on electricity extended
Some EU deliveries suspended 'until further notice'
Manx actress to return to West End in April
No word from Barclays over Island job losses in global cost cutting move