Four ferry sailings are under threat of postponement or cancellation because of weather today.
The Manxman's 8.45am crossing from Douglas to Heysham as well as her 2.15pm return trip may be called off.
A decision on those is expected by around 7am.
Meanwhile, her 7.45pm trip to Lancashire and 2.15am return journey may also be disrupted.
The ship's master is expected to make a final decision about those crossings by 5.30pm.