The 52-year-old made the claim as he broadcast on his nightly LBC show from Brussels on Tuesday evening.
Opening the radio programme, he told his listeners: “I’m here in Brussels where, let me tell you, there are people still in denial!
Nigel Farage was broadcasting from Brussels ahead of Article 50 being triggered
I’m here in Brussels where let me tell you there are people still in denial!
“They still don’t think it’s going to happen, we are not really going to trigger Article 50 and signal our intent to leave the European Union – are we? That’s what they ask me.
“Well, tomorrow at 12:30 UK time, the British ambassador will deliver a letter, the Article 50 letter, to Donald Tusk who is the chairman of the European Council. It is going to happen tomorrow!”
The letter to Mr Tusk, which the Prime Minister signed off on Tuesday evening, beings the two-year time frame for Britain’s exit talks to begin with the Brussels club.
Nigel Farage said the Brussels elite were 'in denial' over Brexit
A spokesman for Downing Street declined to comment on what time Article 50 would be triggered but confirmed the Prime Minister would take part in PMQs, which begins at noon.
The other 27 members of the EU will attend a European Council summit on Saturday, April 29 to decide their joint negotiating position for Brexit talks.
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Mr Tusk has said: “Within 48 hours of the UK triggering Article 50, I will present the draft Brexit guidelines to the EU27 member states.”
The many faces of Nigel Farage Mon, March 27, 2017
UKIP leader Nigel Farage is certainly animated!
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Nigel Farage arrives at BBC Broadcasting House in London
During the 60 minute phone-in, a gleeful Farage described tomorrow's events as the “point of no return” for the UK.
"Which ever way you cut it, folks, tomorrow is a big day,” he continued.
“For me personally a hugely exciting day. We will trigger Article 50, we will pass the point of no return, we are leaving the European Union – hurray!”
“I just worry on many of the aspects of it, the government has gone a little bit soft,” Farage finished.