The Steam Packet company says it's rescheduled two of its sailings over night for operational reasons.
On its website, it says the 7.15pm Douglas to Heysham crossing will now set off at 8.15pm.
And the Manxman's return trip, which was scheduled to leave Lancashire at 1.45am will now depart at 2.30am.
Ronaldsway Met Office is predicting strong winds in the Irish Sea, which could reach gale force tomorrow.
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