Today's race programme has been delayed by an hour by orgnanisers.
Roads around the course are due to close this morning as TT organisers hope to beat this week's weather jinx.
The first section to close will be the section of Mountain Road from Barrule Park to the bungalow at 9.45am, with the rest of the mountain closing at 10am.
Other roads around the course will shut at 10.30am.
Today's racing schedule includes the TT Zero, Senior TT and sidecar race 2.
Steam Packet sailings delayed tonight
PPE Medpro put into liquidation
Part of TT course closed tomorrow
Carl Cox backs cancer charity's TT fundraising auction
Business appeal over thousands in unpaid bills
Pharmacy plans for former IOM Bank
Appeal after wood from van damages car
Island part of union data breach investigation