The evening sailing to Heysham tonight will set off at a later time.
The Ben-my-Chree crossing to the Lancashire Port originally planned to depart at 7.45pm will now leave at 8.30pm.
The Steam Packet Company says this is due to the tidal restrictions at Heysham Port.
Passengers are being told to check-in no later than 7.45pm.
Former Motor Museum goes on the market
No Onchan Park plan, say commissioners
Laxey campsite to get campervan improvements
Local authority: don't suffer in silence at Xmas
Government reminder over salt bins
Weather warning in place for high tides
White Boys touring Island today
Road closed after crash