Coincidentally, Trump has made a decision to stay in London for only one night over his four-day visit, primarily avoiding the vibrant city.
The demonstrations are expected to attract large crowds.
The 6m high balloon shows Mr Trump as a giant baby in a nappy with his trademark blonde hair.
The six-metre-tall inflatable, which wears a diaper and carries a smartphone, is set to fly on Jul 13 between 9.30am and 11.30am above Parliament Square Garden, next to the Houses of Parliament.
The U.S. Embassy in London issued an alert on Tuesday to Americans in the British capital, warning them to keep a low profile during President Donald Trump's visit later this week in case protests against him turn violent.
When is Donald Trump coming to England?
United States ambassador Woody Johnson insisted the balloon was not a fair representation of British views.
It pointed to polling previous year showing up to two million people could take part in anti-Trump actions. I'm 54 years old, we lived through pretty good times.
"I don't think we should roll out the red carpet for somebody that holds such abhorrent views".
Trump has been quick to criticize British society, telling an NRA convention in May that the British didn't have guns but had so much knife crime that one hospital was like a military war zone with its floors awash with blood - a statement quickly rebutted by British physicians and politicians. The attorney has also taken on cases of immigrant families who have been separated under the Trump administration.
A small protest is also planned outside Blenheim Palace in Oxfordshire for when Trump sits with the Prime Minister, with further demonstrations planned around the country. "Are you honestly saying that the right to protest, the right to assemble, the right to free speech is limited by the ridicule it might cause to someone else?"
"The protest against Trump will be a real celebration of the diversity that we love in the United Kingdom - and will give a strong signal that his message of hate and division is not welcome in this country". "They trust us on issues to do with nuclear missiles in a way that they don't trust any other country". The future of its ties is uncertain, muddied by confusion over Brexit. "This is a fight against our own "hostile environment" as well as the American government".
The baby blimp of President Trump is due to be flown over London this week.
Demos on Thursday include one near Blenheim Palace in Oxfordshire where Mr Trump will attend a black-tie dinner, and another not far from the U.S. ambassador's residence in Regent's Park, where Mr Trump and his wife Melania will stay overnight.
Mr Trump will spend the weekend in Scotland where he has two golf courses and plans to play at least once.