Tandy says there will be no excuses from his squad about any logistical challenges.
“We’re going to face two unbelievable tests with limited training but it’s going to be a unique test for us,” said the Wales head coach.
“We’ll probably have one session in Argentina together because there’ll be separate flights over there.
“Then in South Africa, we might get two in but it’s something that we’re looking at.”
Wales have selected a 33-strong travelling squad and the hectic programme means there could be selection changes with a lot of players given game time.
“We’re getting more competitive so there are certain positions we can probably manage things because they are physical,” said Tandy.
The pressure will have eased on Wales following the victory against Fiji but Tandy says his squad will not be dwelling on events at the Cardiff City Stadium.
“This Test match rugby is tough,” said Tandy.
“We’re going to savour the win, but we will not be getting carried away with anything or looking on the outside.”
Argentina will be wounded following their defeat in a 12-try thriller by Scotland, but Wales will need no reminder of the 52-28 win the Pumas inflicted on them in Tandy’s first game as head coach in November 2025.