Saturday 31 July - Australia v All Blacks - Melbourne
Saturday 7 August - All Blacks v Australia - AMI Stadium, Christchurch
Saturday 21 August - South Africa v All Blacks - Johannesburg
Saturday 28 August - South Africa v Australia - Pretoria
Saturday 4 September - South Africa v Australia -Bloemfontein
Saturday 11 September -Australia v All Blacks -Sydney
Those are the fixtures, so the next game for the Springboks is when they start their Home Stand in Jo'Burg against the All Blacks on August 21st.
This Saturday's game is live on ESPN+ at 6.55 am between the Aussies & The All Blacks, so I would guess that the South African games will also be shown live, ESPN have been covering the games so far. Not sure what time kick off is for those games, but I do know that the All Balcks game v Australia on Christchurch on Aug 7th kicks off at 4.35 am our time, not sure I will be either still up, or getting up for that one.