His thumping 6-2 6-3 6-1 victory over Stan Wawrinka meant he won the title without dropping a set during the whole tournament for the third time in his career having previously repeated the feat in 2008 and 2010.
With three major titles under his belt, Wawrinka is known for his aggressive backhand shots and has a ideal 3-0 record in Grand Slam finals.
"It is the most important event in my career, to win again here is impossible to describe".
"I'm a little emotional", he said.
"For me to be here for many years is hard to describe".
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Piers Morgan, who previously criticised the star in the wake of the attack, tweeted: I misjudged you, @ArianaGrande & I apologise. But that wasn't going to stop them from coming back to show support for both Grande and the 22 people killed in the attack.
But he has responded this year by making the final of the Australian Open and dominating the clay court season, losing just one match to Dominic Thiem in Rome while sweeping to titles in Monte Carlo, Barcelona and Madrid. It will always be in my heart. I'd like to thank all of you today. But the 2015 champion could not convert it and it proved to be the only break point he earned all afternoon.
"I try my best in all events but the feeling I have here is impossible to describe", Nadal added.
Nadal forced Wawrinka into another forehand error to break for 2-0 in the second set before the Swiss halted a run of seven games lost with a hold for 1-3.
The sun is shining, there is barely a trace of cloud in the sky and the temperature is about 85 degrees (30 Celsius) as Sunday's title match approaches.
A year later, in one of the greatest sporting accomplishments on the most demanding surface tennis can offer, Nadal completed his most dominant performance at Roland Garros by ramming through Stanislas Wawrinka in straight sets yesterday. After holding his serve in the first game, Nadal broke Wawrinka's serve to love in the next. For sure this score wasn't good, the match wasn't good, but at the end of the day there's a lot of positives to take from the last few weeks.' If you look at Roland Garros over the last two weeks, the tennis you have played, including beating the World's No.