A revised timetable for the floating bridge will be in place over the next four evenings.
The chain ferry will be limited to two return sailings per hour between 5pm and 8pm, starting tonight (Thursday).
It will leave on the hour and half hour from East Cowes, immediately returning from Cowes.
A launch boat will be available for foot passengers throughout the affected period.
Isle of Wight Radio has asked the Isle of Wight Council for a comment on the cause of the timetable changes.