The Italian forward has led the Owls to the Championship play-offs.
However, the waterworks are not out of sadness, or frustration at successive red cards which unfairly damaged his reputation in February and March. Instead they are tears of happiness.
"This has been an amazing, unbelievable year for me," Forestieri told the Star.
"Sometimes when I have gone home and thought about what I have done, I have cried.
"I have never had such a beautiful season."
He's not wrong, either.
While he may have been promoted with Watford last season, and reached they play-off final two years before that, on an individual level Forestieri has never had it so good.
His 15 goals and seven assists in this year's Championship are, combined, more than he's ever managed in England's second tier.
Though the Italian forward was equally popular at Vicarage Road as he is at Hillsborough, he was never as integral a squad member as he has been in 2015-16.
And it could yet get even better for Forestieri, whose team kick off their play-off campaign against Brighton & Hove Albion on Friday.