Roads are due to close at 6pm for what will now be the first practice of the Festival of Motorcycling.
Poor weather and a lack of marshals cancelled Saturday's session.
The newcomers will go out for a speed-controlled lap behind the travelling marshals at 6.20pm.
Senior, Junior and SuperTwin Manx Grand Prix competitors will then go out at 6.55pm.
Finally, it'll be the turn of Classic TT, Lightweight MGP and again the newcomers at 7.30pm.
Roads around the Mountain Course are due to open no later than 9pm.
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Almost 38,000 passengers used ferry services to travel to Island during TT