The Steam Packet company says bad weather may affect four sailings today and tomorrow.
The 7.15pm Douglas to Heysham sailing, and return trip at 1.45am are both at risk - a decision on those is expected at around 5pm.
Also at risk are the Manxman's 8am Douglas to Heysham voyage and her return at 1.45pm on Thursday - a decision on those crossings is expected by 6am on Thursday, March 12.
Ronaldsway Met Office says winds could become gale to severe gale force overnight on Wednesday and into Thursday morning.
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