Today's Manannan sailing from Douglas to Liverpool and its return journey are delayed because of operational reasons.
The Steam Packet Company says the first departure will now be at 4pm instead of 3pm.
The second journey will leave Liverpool at 8pm instead of 7.15pm.
It follows numerous delays to and from the new Liverpool Ferry Terminal this week - one yesterday morning and last night.
Joe Locke lands purr-fect new role!
Steam Packet fuel surcharge isn't about profit, says chief minister
Ferry crossing delayed by half an hour
Paw-some rescue effort after Milo gets trapped in ravine
New laws for young workers come into force today
Manx Care extends mental health service to more surgeries
Bus Vannin confirms normal services to run over Easter
Steam Packet's new Northern Irish route launches today