A father and son have drowned at a popular swimming spot in Queensland’s far north.

The 59-year-old father and his son, 21, got into trouble at a Crystal Cascades waterfall near Cairns just after 5pm on Tuesday.

The men were found unresponsive in the water and assessed by paramedics but declared dead at the scene.

Media reports identified them as Melbourne men Sisira Gajanayake and his son Themiya Gajanayake, who were on holiday with more than a dozen other family and friends.

Sisira got into trouble and his son tried to save him, Seven News reported.

“He threw himself in harm’s way to try and save him and unfortunately they both passed,” family friend Damien Gamage told the broadcaster at a gathering in Melbourne to mourn the two men.