The embassy also warned Americans, however, to "exercise caution if unexpectedly in the vicinity of large gatherings that may become violent".
Morgan said it was "utterly ironic and weird" that there could be bigger protests around Mr Trump's visit than during trips to the United Kingdom by the leaders of countries with questionable human rights records including Saudi Arabia and Turkey.
On Friday evening, Trump and the First Lady whisk up to Scotland for a weekend of golf and relaxation - and more protests outside his resort.
Norfolk members of Together Against Trump are planning to join protests in London and have organised a coach to get people to the capital.
Mr Trump is due to land this afternoon before attending a black-tie dinner at Blenheim Palace in his honour, where protesters will gather at the gates.
On the United States embassy: Trump cancelled his first planned visit earlier this year, saying the embassy's move from Grosvenor Square in Mayfair district to an "off location" at Nine Elms, south of the Thames, was a "bad deal".
Defending Wimbledon champion Federer ousted in quarter-finals
He is the 8th ranked player on the ATP World Tour, and will have a chance to elevate that over the next few days in England. I feel I'm peaking at the right time. "I have already gotten tons of messages from support back home ", Anderson said .
But as President Trump arrives in Britain on Thursday, he will find plenty of people who think it is more important to oppose him than it is to nurture U.S. -U.K. ties.
Publican Damien Smyth is an unabashed Trump fan and came up with the idea over a few late-night drinks with a friend. "I like Boris Johnson, I've always liked him", said Mr Trump.
May reached out to him just days after Trump was inaugurated, extending the invitation for a coveted state visit that would be hosted by Queen Elizabeth II, but that gesture has proved far more controversial than expected as Trump has shown little interest in maintaining "diplomacy as usual" with European allies.
"He's been very, very nice to me, very supportive", he said.
The next stop on the president's tour of England is a helicopter journey to Winfield House, which is the American ambassador's residence located in Regents Park.
Then on Monday, he will be off to Helsinki to meet with Russian President Vladimir Putin.
Trump angered May and many Britons by tweeting inflammatory and unverified videos made by Britain First, an anti-Muslim group whose leaders have been convicted of hate crimes, and by characterizing parts of London and other cities as no-go areas because of a purported Muslim-related crime wave.
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