The winner came in the 65th minute when Anis Nuur found the back of the net after good work from Tom Leggett and Harry Cooksley.
Yate were desperate for a victory to try and move away from Wintney in second-bottom in the Southern League Premier South, but fell to a morale-sapping loss.
The result means they stay third-bottom (28 points), one point ahead of last weekend’s opponents. Bottom of the table North Leigh have 25 points but do have a game in hand on the two sides above them.
Wintney keeper Marcin Brzozowski did produce a stunning double save in the last minute to deny Yate what could have been a crucial point.
But their luck was out and the run of defeats continues and with eight games left to play, relegation continues to pose a serious threat to