Racing is set to continue today - with three races on the schedule for the Classic TT and Manx Grand Prix.
However, Clerk of the Course Gary Thompson has confirmed there's been an hour delay.
Roads are now due to start closing around the course at 10.30am - it's due to low lying mist around the course.
A revised schedule of today's races will be announced at 9am.
Currently, roads are expected to re-open no later than 9pm this evening.
Stop putting knives in recycling, says council
Bee Gees to release limited-edition box set
Northern Irish politician criticises Manx visa rules
Elective surgical unit opens at hospital
Piling rig on TT course tonight
10-day bus strike from next weekend
Yellow snow warning issued by forecasters
Ramsey harbour keeper completes 3,000-Mile Atlantic crossing