"It's tragic. He was quite a lovely person," he told the Bay of Plenty Times through tears.
"He was my younger brother but I would like to be like him. He was so lively."
Mr Jawad moved to New Zealand in April and was working as a Telecom engineer.
"He was quite happy here," Mr Hammad said. "He had plans, everything to be done, but everything is gone with him now."
Mr Hammad put the accident down to "bad luck" as his brother was a good swimmer.
"He was quite an adventurous person - boats, gym, photography. He loved photography," he said. "He was a selfless person. He liked to keep everyone happy all the time. He kept on cracking jokes."
His brother had become engaged to a Pakistani woman, who was studying in Germany, a few months ago, Mr Hammad said.
He was a swimmer. He went to the pool to swim quite often ... He was an athlete, played lots of sports.
He had spoken with her since the news of Mr Jawad's death and said she was "already broken" by the news. She would also be returning to Pakistan for the funeral.
Mr Jawad had driven down from Auckland for the night with his friends Faizan Mir and Hassan Naqui when they decided to stop at McLaren Falls at the base of the Kaimai Range in the Western Bay of Plenty.
A "quick swim" turned into a fatal accident when Mr Jawad began to struggle in deeper water and disappeared beneath the surface.
The Pakistani men had come down for the weekend and were looking for a good camping spot, Mr Mir said.
"We just wanted to see McLaren Falls because we wanted to see the campsite so we passed by and saw this place and he was very keen to have a quick swim before we carried on to Mount Maunganui."
Mr Jawad went in by himself as his friends were not keen on a swim.
He walked down the rocks along the side of the McLaren Falls bridge and climbed into the water from there, Mr Mir said.
"He just splashed some water on his body. We were taking pictures from up the top.
"He jumped in and was swimming for a while and we just realised he was panicking a little. Some other people jumped in to help and my friend [Hassan] jumped in to help but they couldn't and he just went under the surface."
The men yelled to bystanders to call 111 but their friend did not resurface.
"I'm gutted, it's tragic," Mr Mir said.
The Police Dive Squad retrieved his body about 8pm on Saturday.
Mr Mir could not understand how the tragedy had happened.
"He was a swimmer. He went to the pool to swim quite often ... He was an athlete, played lots of sports.
"He was very happy and jolly. A really nice guy."
Senior Sergeant Glenn Saunders, of Tauranga police, said it was a tragic reminder for people to remember their limitations in water. He confirmed a man of Pakistani descent had gone swimming and had not resurfaced after getting into trouble in deeper water.
