The Independent Electoral Commission (IEC) said voting is proceeding well in several countries around the world as South Africans make their mark today.
Voting is underway in parts of Africa, Europe and Asia.
But in Australia the South African High Commission in the capital Canberra, the third largest overseas voting station after London and Dubai, has been flooded with complaints from prospective voters.
The High Commissioner in Canberra said just over 1200 people are expected to pass through their voting rooms.
Although a few voters have travelled from Perth, more than 3000 kilometres away, many haven't been able to muster the resources to make the journey.
High commissioner officials said they sympathise with the voters as they wanted everyone to exercise their democratic right but the decision was out of their hands.
Polling will continue until 9pm after which the boxes will be couriered to South Africa for counting.
Thousands line up to vote
Thousands of people have already started arriving at the voting station in London.
South Africa's largest expat community lives in the English capital where 9000 people have registered to take part in the elections.
South African Gerard Pilz said there are close to a thousand people already waiting in the queue.
"The sun is shining and people are smiling and the turnout is amazing."
South Africans living at home will go to the polls on 7 May.