Newcastle beachgoers on Tuesday morning were greeted by the strange sight of 40 people dressed in Donald Trump masks and suits rolling off plastic chairs and into the surf.

The group of doppelgangers was led to the fake press conference on Nobby's Beach by one of the Trumps carrying a combined US/Australia flag.

One of the impersonators then wiped the phrase "Paris agreement, we the parties blah blah blah" from the sand, before the entire group marched into the waves.

Impersonators marched a combined US/Australian flag to the fake press conference on the beach. ( Supplied: Jason Freddi )

The stunt was organised and filmed by the TrumpMyTrump group to coincide with US Independence Day celebrations on July 4.

Jason Freddi, a Melbourne-based artist who organised the event, said he hoped it would prompt people to outdo each other with their own satirical videos dressed as the US President.

"That's the idea - here's my Trump ... I want you and anybody else now to come and trump my Trump, with your Trump," he said.

"I put 40 of them on the stage, let's see if someone can put 100 of them somewhere."

Organisers hoped the stunt would inspire others to try to outdo the fake press conference. ( Supplied: Jason Freddi )

Putting together the fake press conference involved having a box of Trump masks "couriered from China", sewing a flag and buying red ties and suits from op-shops "up and down the coast".

Mr Freddi said the image of the current US President was used because he was instantly engaging.

"The man is just so captivating, when you compare him to other figures - the Obamas or even the George Bushes - no-one fascinates us quite like Donald Trump," he said.

"He's sort of the fulfillment of an era in which the message has become disconnected from reality."

The stunt took place during the Students of Sustainability conference, an annual event of the Australian Student Environment Network which was held in Newcastle over the weekend.

About 40 people gathered on Nobbys Beach for the stunt. ( Supplied: Jason Freddi )

Mr Freddi said the beach press conference was to draw attention to Trump's decision to withdraw the USA from the Paris agreement, the political alliance between Australia and America, and environmental issues like climate change.

But he stressed that anyone could take the TrumpMyTrump concept for their own purposes.

"The real point is to depoliticise it, to get the images out there and you can do that through that humour and satire," he said.

"We're hoping the images and the story it tells, that people can make their own interpretation.

"For many years [we've had the Anonymous mask] as this sort of emblem of Anonymous, well we don't need to be anonymous anymore, we all can be Donald Trump."