The Thunder seemed to be out of sorts as the Scorchers made the early breakthrough as the returning Katherine Brunt took the wicket of the dangerous Rachel Priest second ball.
Brunt had missed the game yesterday as she continued to recover from a sore back injury, her aggression fired up the fielding side as they looked for early wickets.
They were hoping that their Australian international pair of Racheal Haynes and Alex Blackwell would start to build the momentum.
Haynes had faced 12 balls when she hit an easy catch to Lauren Ebsary at mid-wicket to give Nicole Bolton the wicket and continue her impressive form with the ball.
Blackwell along with Stafanie Taylor put on 113 for the third wicket. There was contrasting for each batter Blackwell reached her fifty from 39 balls, whereas Taylor never seemed to be hitting the ball with any timing.
It is unusual for Taylor who can hit hard. There was a point where she was scoring at such a slow rate that it would have been better for her to try and hit sixes or get out. She did neither as the Thunder had Harmanpreet Kaur and Naomi Stalenberg still to bat.
Taylor finally lost her wicket with three balls of the innings left to finish on 31 from 45 balls. It left the Thunder fifteen to twenty runs short of where they would have wished with the Scorchers top order able to chase down modest targets.
The Thunder may have thought they had a chance when they got Elyse Villani early on as she was run out from a direct hit from Stalenberg.
It was to all go wrong for Stalenberg and the Thunder as her over went for 14. It went from bad to worse the next over as Nicola Carey bowled down the leg side and caused Priest the keeper problems as the ball found the boundary from wides or boundaries. When Carey readjusted her line Natalie Sciver her through point.
Suddenly the Scorchers were 64 for 1 from the power play and never looked like losing it from there. Bolton and Sciver put on 69 for the second wicket from just 20 balls.
When Bolton found Kaur on the deep mid-wicket boundary to give the spinner Maisy Gibson the wicket the damage had been done.
Sciver and Brunt eased to the target as the Thunder bowled tighter lines. The Scorchers might regret not trying to chase down quicker with a bunch of teams looking to fill the four semi-final spots it may come down to run rate.
Sciver finished with 61 not out from 50 balls, it will be good for the England international who has been inconsistent with the bat so far.
Sydney Thunder v Perth Scorchers
Sydney Thunder 134 for 4 (Blackwell 81 not out, Brunt 1 for 13)
Perth Scorchers 136 for 2 (Sciver 61 not out, Gibson 1 for 18)