Dylan Macallisterâ€™s 20th minute goal proved the difference as Ricki Herbertâ€™s men produced the result they required at home to replace Melbourne Heart in the top six with three matches remaining in their regular season.
The Jets slumped to their straight loss and are now in danger of missing the playoffs if they cannot turn around their current form which has them sitting four points behind the Phoenix but with one game in hand on todayâ€™s opponents.
Venue: Westpac Stadium, Wellington
Crowd: approx. 6,000
Referee: Chris Beath
Yellow cards: WP - Andrew Durante 53â€™, Troy Hearfield 56â€™, Vince Lia 68â€™, Ben Sigmund 80â€™, Manny Muscat 82â€™
NJ - Nikolai Topor-Stanley 26â€™, Ben Sigmund 80â€™
Red card: NJ - Ryan Griffiths 66â€™
The home side were making all the running in the early stages with Newcastle looking devoid of any attacking threat and it was to prove beneficial for the Phoenix when hit the lead in the 20th minute.
GOAL Manny Muscat played a nice ball down the right flank into the path of exciting youngster Marco Rojas who put on the after burners and took Adam Dâ€™Apuzzo to school before slotting it into the path of Dylan Macallister who knocked it past Jets keeper Ben Kennedy with a first-time shot from the edge of the six-yard box for his sixth goal in his last eight outings.
The goal sparked both sides into action after a slow beginning but it was the Phoenix again looking more dangerous with two late chances in the first half coming from Nick Ward and Macallister who both should have done better to double the advantage.
Wellingtonâ€™s Troy Hearfield hit the side netting early in the second half before Newcastleâ€™s Marko Jesic struck the upright after his shot had Danny Vukovic stranded.
Vukovic produced a great diving save in the 59th minute from a Ryan Griffiths header and five minutes later, Phoenix midfielder Tim Brown scuffed a good opportunity before some drama ensued involving the Jets.
Griffiths was shown a straight red by referee Chris Beath after a challenge but it must have been for backchat as the tackle did not seem to be too harsh.
The job for the visitors was now made extremely difficult but they made their intentions clear by pushing forward with regularity despite the fact they were a man down. However, it almost went against them when Wellingtonâ€™s Rojas sent a ball into the path of substitute Daniel who wasnâ€™t far off knocking it into the back of the net.
Wellington controlled the tempo of the match in the dying stages and despite a late scare as the Jets chased a leveler, managed to hold on to a narrow 1-0 win, enhancing their finals chances.
Danny Vukovic (gk), Manny Muscat, Andrew Durante, Ben Sigmund, Tony Lochhead, Troy Hearfield, Nick Ward (Daniel 60â€™), Tim Brown, Vince Lia (Greenacre 71â€™), Marco Rojas, Dylan Macallister
Subs - Reece Crowther (gk), Daniel (60â€™), Chris Greenacre (72â€™), Oscar Roberto Cornejo
Ben Kennedy (gk), Adam Dâ€™Apuzzo, Taylor Regan, Nikolai Topor-Stanley, Tarek Elrich (Virgili 74â€™), Marcello Fiorentini, Jeremy Brockie (Haliti 70â€™), Jobe Wheelhouse, Sam Gallaway, Marko Jesic, Ryan Griffiths
Subs - Matthew Nash (gk), Labinot Haliti (70â€™), James Virgili (74â€™), Jacob Pepper