The 2018 Commonwealth Games will be Lewis's first major international competition.
Lewis learnt to swim with the TSW Dolphins under Steve Francis and recalls his highlight of learning to swim as being tested at the end of every lesson to see how long he could hold his breath for.
2017 was a standout year for Lewis who won three golds and four silver medals at the Commonwealth Youth Games in the Bahamas.
Lewis also won eight gold medals at the 2017 New Zealand Age Group Championships.
At the 2016 New Zealand Age Group Championships Lewis won four national age group titles, in the 200m and 400m freestyle, 200m butterfly and 400m individual medley.