Question

when it is summer in south Africa Australia has winter​

Answer 1

Answer:

The seasons in the Northern Hemisphere are the opposite of those in the Southern Hemisphere. This means that in Argentina and Australia, winter begins in June. The winter solstice in the Southern Hemisphere is June 20 or 21, while the summer solstice, the longest day of the year, is December 21 or 22.

Answer 2

Since earth is inclined at an 23.5 °, the two hemispheres experience different seasons at a time.

Australia lies in southern hemisphere while Africa in northern hemisphere. Hence, when Australia experiences winter, Africa experiences summer and vice versa.