After the cancellation of Wednesday evening practice session due to low-lying mist on the primary A18 Mountain Road section of the TT Course the next TT Race practice was held on the evening of Thursday 31 May 2007. The traditional Thursday afternoon practice session held since 1937 was moved to an evening practice session in line with the Manx Grand Prix to increase the availability of race marshals. The Thursday evening TT practice session was dominated again by John McGuinness who posted a lap of an average speed of 129.084 mph which was slightly slower than his outright TT lap record of an average speed of 129.45 mph. The Sidecar TT practice was dominated again by the local Isle of Man crew of Nick Crowe/Dan Sayle with a lap at an average speed of 114.125 mph. At Cruickshanks corner in Ramsey, James Coward suffered fractures to the lower leg after an accident and John Crellin hit a seagull on the Mountain Section.