On a windy day at Plessey Road, Blyth ended league leaders Hartlepool who went into the contest with a 100 per cent record including scoring a bonus point in every game.
Playing with the strong wind and the sun at their backs, the visitors had most of the early possession and almost scored when the winger chased a kick ahead but was pulled back by the referee for offside.
They did get on the scoreboard with a penalty after ten minutes when Blyth were caught offside.
A mistake by Hartlepool allowed home centre Liam Allen to scoop the ball up inside his own half and outpace the defence to score between the posts, Devon Reece adding the conversion.
But Hartlepool hit back to regain the lead with another penalty.
In the second half Blyth had the advantage of the wind conditions and thought they had scored when Langdon broke through and recycled the ball out to Jarvis. But the try was disallowed for a foot in touch.
This caused Blyth to lose concentration and against the run of play Hartlepool scored an unconverted try to stretch their lead.
With 20 minutes left, Allen put Blyth back in the lead with another break from his own half, the conversion added by Reece.
Blyth felt they should have been awarded a penalty try when the winger was tackled just as he was about to gather the ball and score, but the referee only gave a penalty.
But the home side sealed the win with a break close to the scrum by stand-in scrum-half Sutherland allowing Davie to score, Reece again adding the extra points.
On the stroke of full-time Hartlepool salvaged a losing bonus point with a penalty.
Due to the World Cup final there is no game next weekend but the seconds are playing Westoe on Friday night.
On Saturday, November 7, the club have a 1980s tribute band, The 2 80s, playing. Tickets from the club are £2.50.