But there were "no surprises" involved in their snap Big Apple ceremony - which followed his Augusta Masters appearance - as it had been arranged for months, the golf star revealed.
"Anyone who knows Wendy knows that she doesn't like the limelight or anything like that," the Offaly man (29) explained.
Shane and Wendy hit it off instantly after meeting on a "random night out" four years ago, and he got down on bended knee in Dubai at the end of 2014.
Knowing that they would have had to have invited "everybody" if they had gotten married on Irish soil, they instead opted for a quiet occasion in New York, with just close family by their side.
"As long as we knew our families were happy, we were going to go ahead with it," he said, revealing that the couple fell in love with New York after a visit there together last June.
Lowry was in Dublin to launch the One For Ireland campaign to fight against homelessness alongside TV presenter Jenny Buckley in his first public appearance since his wedding two weeks ago. The initiative - set up by seven Trinity College students - asks people to donate €1 for homeless charities this Friday.
Lowry revealed that their perfect wedding started with an 11am ceremony at City Hall.
Wendy, who is a nurse, wore a gown by British designer Stephanie Allin.
The couple hired an Irish photographer to capture the special occasion, with photos at locations such as Brooklyn Bridge and Central Park, before going for lunch. They then "took it easy" with a nice dinner later.
"It was really all very chilled," he said. "We woke up the next morning and were totally happy at what we were after doing. It was perfect for the two of us."
Currently number 33 in the world rankings, Lowry quipped that the only thing that could make him happier would be "a bit of good golf now and again".
Of his perfect hole-in-one at the Masters, he said: "It made my dinner taste a little bit better that evening."
However, he conceded the weekend didn't go as planned, so he had been a little disappointed.
He has now donated the ball for a charity auction. Referring to Christy O'Connor Jnr's stunning two-iron on the 18th hole at the Belfry that gave Europe the vital point needed to retain the Ryder Cup in 1989, he joked: "It's not going to be like Christy's two-iron - there's only going to be one of them."
Meanwhile, he said he was delighted to support the One for Ireland cause.
Customers at convenience stores like Spar, XL, Londis and Mace, as well as Applegreen, Fresh and Starbucks, will be asked this Friday if they want to add €1 to their bill to raise money for homelessness charities.
One for Ireland founder, Max Doyle, explained: "We want to target more people but ask them for less money."
Under the banner '1 Cause, 1 Euro, 1 Day', the campaign will particularly target the 1,800 children living on the margins of Irish society.
Niall O'Loughlin, of the Irish Youth Foundation, said the speed at which the homeless crisis had escalated across the country was "almost beyond belief".