The Steam Packet company says this afternoon's Manxman sailing will run more than an hour behind schedule.
Bad weather's meant cancelled and delayed sailings this week.
This morning, the crossing from Douglas to Heysham set out around 40 minutes late.
In its latest update, the ferry firm says the return trip will set out at 3.30pm instead of its planned 2.15pm departure.
Attorney General says he's stepping down
Road closures in two towns for running event this week
Six weekend ferry crossings could face disruption
President of Tynwald announces retirement
Police close Mountain road
Fuel firm says "fingers crossed" for calmer energy costs
Ring doorbells will need data protection registration - but shouldn't cost you money