Fog on the Mountain section, and wet patches at various locations around the course put paid to this evening's TT practice session.
A decision to call it off was made by 6.30pm, with no riders going out at all.
The clerk of the course had initially gone for a 20 to 30-minute delay, to see if conditions would improve, but that was not to be the case.
Manx Radio TT's Chris Kinley described the scene at the Grandstand, after the announcement was made:
FC Isle of Man to host in-form Atherton LR
Visitors currently on eight-match winning streak
Hockey: Cup semi-finals await this weekend
Places in April finals up for grabs in last-four phase
Rugby: Douglas' play-off quest to continue against Firwood Waterloo
Vagabonds Ladies to welcome Bury to Ballafletcher
Football: FA Cup & Woods Cup continue on busy weekend schedule
Northern showdown in top flight among league clashes
