Here are 13 spectacular pictures taking around the 4.25-mile course, where racing concludes with Championship Day on Thursday, July 14.
5. 5
Dean Harrison on the DAO Racing Kawasaki ZX-10RR leads Davey Todd (Milenco by Padgett's Honda Fireblade) on his way to victory in the second Senior race in glorious weather on Wednesday evening.
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Ballymoney's Michael Dunlop took third on the Buildbase Suzuki GSX-R100RR in Tuesday's opening Senior race at the Southern 100.
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Impressive Manx rider Nathan Harrison from Onchan on the Isle of Man Steam Packet Company Honda Fireblade leading Michael Dunlop in the Senior race on Tuesday evening.
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Davey Todd (Milenco by Padgett's Honda) leads the pack as they chase after race leader Dean Harrison (out of picture) in the opening Senior race.