More than a dozen Steam Packet sailings have been rescheduled over the weekend and next week because of tidal conditions in Douglas.
Four Manxman sailings on Saturday have been rescheduled along with another four on Sunday.
The disruption continues into next week, with three crossings affected on Monday followed by another three on Tuesday.
Sailing times for a number of trips have also been extended, with the 4.15pm crossing on Tuesday now expected to take five hours.
The Manannan, now back in service on the Liverpool route, is unaffected.
Sam Barks to present radio show
Hospital sees nearly 300,000 calls over past year
Police tackle school parking offender on first day back
Middle gets pre-election requisition meeting
Anyone can make parking discs - but only the DOI's are legal
Douglas hotel's football sign could be worth £15k
Douglas church becomes House of Dog
Manx mums relate to Paris's school holidays feelings