Return journey could also be affected
The Ben-my-Chree sailing from Douglas to Heysham this evening is at risk of possible disruption or cancellation.
The Steam Packet says it is due to the forecast adverse weather conditions.
A decision on the sailing will be made by 5.30pm, it's scheduled to leave at 7:45pm.
It means tomorrow's return journey from Heysham to Douglas at 2.15am could also be affected.