An emotional Curtis McGrath has praised his family after adding another chapter to his decorated career by winning a fourth Paralympics gold medal.

McGrath won the men's kayak single 200m KL2 event for the third straight Paralympics on Saturday night, Australian time.

The 26-year-old para canoeist could win an incredible fifth Paralympic gold when he defends his title in the men's va-a single 200m VL3 event on Sunday at the Paris Games.

McGrath was competing only a few months after his wife Rachel gave birth to their first child, Monty.

Monty needed open-heart surgery after being born, just weeks before McGrath was to leave for overseas ahead of the Paris Paralympics.

McGrath said it was tough leaving his family in Australia and he dedicated his win to Rachel and Monty.

"I'm not here just to represent Australia, I'm here to represent my family and they mean so much to me," McGrath told the Nine Network.

"It's been hard, so it's important that I did it for them too.

"The goodbye that we had on the 10th of August was one of the hardest I've ever had to do.

"We're just out here doing sport so it's not actually that important, but when we're representing people and countries and our family members it means more.

"It's special to have this accolade and I'm just proud to represent everyone involved in this team."

McGrath won gold at Rio and Tokyo in the event but has been at lengths to say how he feels his rivals are beginning to catch up.

But despite Great Britain's David Phillipson (silver) and Ukranian Mykola Syniuk (bronze) threatening to cause an upset early on, McGrath finished in style at Vaires-sur-Marne Stadium.

McGrath turned on the afterburners over the final 100m to finish in a time of 41.31 seconds.

His success came before Dylan Littlehales clinched silver in the men's kayak single 200m KL3 final.

Littlehales had narrowly missed the podium in Tokyo, but a late surge helped him to medal in Paris.

Susan Seipel won bronze for Australia in the women's va'a single 200m VL2 event.

ABC/AAP