Still only 21 years of age, the highly-rated midfielder has already taken in a high-profile move to Liverpool and a £5million switch to the Liberty Stadium.
He has also turned out for England at every level, including one senior cap against San Marino in October 2012.
A number of impressive displays this season suggest he could force his way into Roy Hodgson's plans for the 2014 World Cup.
Wieghorst would be delighted to see Shelvey's talents recognised by a seat on the plane to Brazil, but is convinced the youngster will go from strength to strength regardless of whether he is selected or not.
The former Celtic midfielder said: "I don't think the English manager has made up his mind yet but Jonjo obviously is a young man and if he keeps playing like this, who knows?
"We would certainly be very happy if he keeps performing like that. What he did against Newcastle was great.
"It is maybe a bit too early to say about the World Cup but I think he's got a very bright future.
"He's got so many qualities as a footballer. He's technically gifted, he sees the game well, he sees the pass, he has a strike on him and I think playing as the advanced man in a three-man midfield suits him very well because it's easier for him to get closer to goal, make his deep runs and he has more security behind him.
"I know he plays on the edge at times, but I think you need that, he certainly does as long as you know where to draw the line."
Next up for Shelvey and Swansea is a home date with Hull City on Monday, an encounter Wieghorst insists the home side will not be taking lightly - with Steve Bruce's Tigers having impressed upon their return to the top tier.
"They've definitely surprised me a little bit," he said.
"The points they've collected so far, for a promoted team is very good.
"I watched bits of their game against Liverpool, and they performed well and deserved the win so they can't be taken lightly.
"Not so long ago Swansea were the newcomers in the Premier League, Hull have put up some great performances and picked up points so we should know what it's all about."