South Africa's next match depends on the sport:

• In cricket, South Africa's ongoing tour of Australia includes two more ODIs scheduled for August 22 and August 24, 2025, in Mackay, Australia.
• In rugby union, South Africa's Springboks have a match against Australia on August 23, 2025, at DHL Stadium, Cape Town.
• In football (soccer), South Africa's national team has upcoming FIFA World Cup qualifying matches starting September 2025.

If the question is about the South African rugby team (Springboks), their next match is on August 23, 2025, against Australia in Cape Town. If it is about the South African cricket team playing in Australia, then the next match is on August 22, 2025, in Mackay. Please specify the sport for more precise info, but from the latest schedules:

• Cricket ODI: August 22, 2025
• Rugby vs Australia: August 23, 2025

Both matches are imminent next fixtures for South Africa in August 2025.