Wednesday posted their third consecutive win in the Championship at The City Ground on Saturday.
Goals from Kieran Lee and Chris Maguire either side of the interval saw the Owls extend their strong run in the division to five wins from seven.
In what was one of Wednesday’s best away performances of the campaign to date, the visitors largely bossed the contest against out of form Forest and were excellent value for the three points.
The hosts went into the clash in need of a huge boost after just two wins from 19.
But Wednesday on the other were in good form and looking to end a long wait for a travelling triumph at The City Ground, dating back to 2001.
The visitors started brightly with Jacques Maghoma at the heart of the action, who created an early opening but was denied at the last by a fine Jamaal Lascelles challenge.
Chris Maguire had a good shout for a penalty 12 minutes into the contest when Lascelles appeared to bring down the forward just inside the area.
But Forest were not without their moments as danger man Britt Assombalonga entered Owls territory with menace but was halted by a well-timed Tom Lees lunging challenge.
Then came Forest’s best chance from a corner on the half-hour mark but as the ball fell to Robert Tesche just yards from goal, Keiren Westwood was on hand to make a key stop from the powerful drive.
But when the breakthrough came, it was for the Owls and right on the stroke of half time.
Maguire found Stevie May with a neat feed down the right channel and the Scot did well to swing in a centre for Atdhe Nuhiu to head towards goal and Lee to bundle beneath Dorus De Vries.
And just five minutes after the restart, the situation improved for Wednesday as Stuart Gray’s side found themselves two goals to the good.
Claude Dielna whipped in from the left and Maguire took a touch to bring the ball back inside his marker and drill into the bottom corner.
With Wednesday well in the box seat, they attacked at will and De Vries was to thank for keeping the deficit down to two, saving from May and then Maguire on the rebound.
Forest were struggling to cope with the relentless Owls pressure and Nuhiu came within a whisker of putting the game out of reach with a crisp volley that flew the wrong side of the upright.
The Midlanders offered little in return and Wednesday were able to see out the remainder of the clash untroubled to post a convincing victory.
Forest: De Vries, Lichaj, Assombalonga (Veldwuk 68), Lascelles, Kane (Paterson 68), Antonio, Vaughan, Hobbs, C Burke (Gardner 46), Tesche, Osborn
Owls: Westwood, Palmer, Lees, Loovens, Dielna, Maguire (Lavery 85), Lee, Semedo, Maghoma (Baker 81), May (Helan 71), Nuhiu