Independent Jacqui Scruby set to become first teal MP in NSW ...

Independent Jacqui Scruby is set to become the first teal MP in the NSW parliament, with the candidate on track to snatch the Sydney Northern Beaches seat of Pittwater from the Liberal Party.

With more than 62 per cent of the vote counted, the ABC projected Ms Scruby to win after a 6 per cent swing against Liberal candidate Georgia Ryburn in the traditionally blue-ribbon electorate.

The Climate 200-backed independent told her supporters the results were "looking incredible" but stopped short of declaring victory last night.

"I'm very conscious that all the pre-poll [voting] hasn't been counted," Ms Scruby told the jubilant crowd at Avalon Surf Life Saving Club.

Jacqui Scruby with teal MP Sophie Scamps (left).  (ABC News: Alexander Lewis)

Last year, Ms Scruby was narrowly beaten by the Liberals' Rory Amon, with just 606 votes separating them.

Mr Amon quit parliament in August after being charged with child-sex offences, which he denies, triggering a by-election.

"Compared to last time, I'm feeling a lot more confident," Ms Scruby told the ABC.

"I'm very excited but also don't want to do anything too early because I have been here before."

Despite her cautious remarks, Ms Scruby could not resist joining her supporters for a dance when the Joanne Accom hit Jackie blasted from the speakers.

Dancing alongside her was federal teal independent MP Sophie Scamps, who Ms Scruby worked for as a campaign manager before launching her own political career.

Ms Scamps's electorate of Mackellar encompasses the state seat of Pittwater.

"I think what we've shown in the federal level of parliament is that we are constructive… we work across the aisle," Ms Scamps said.

Ms Scruby was critical of her Liberal opponent who she said did not live in the local community.  (ABC News: Nick Dole)

In her pitch to voters, Ms Scruby argued a crossbencher would have more influence than an opposition MP as Labor was governing in minority.

She pointed to the Equality Bill passed by independent MP Alex Greenwich earlier this week.

"A strong, independent voice can bring issues to the parliament and really push the major parties to do better," she said.

While Liberal candidate Georgia Ryburn was not conceding defeat on Saturday night, she told the party faithful "the path to victory is difficult".

Ms Ryburn was moved to tears as she received a standing ovation from party members at an election-night event in Mona Vale.

Liberal candidate Georgia Ryburn teared up as she described a "difficult" campaign.  (ABC News: Nick Dole)

"It has been the honour of my life to run as your Liberal candidate," she told the audience.

Ms Ryburn said it had been a challenging campaign from day one.

"The teal candidates like to push the narrative that they are the David and we are the Goliath. This isn't the case," she said.

"Before we'd even had a rigorous and democratic preselection process, the teal campaign was well underway.

"They were already very well funded and were already out on the hustings."

During the campaign, Ms Scruby portrayed her Liberal opponent as an outsider because she lived outside the Pittwater electorate.

Ms Ryburn told supporters being the Liberal candidate had been the "honour of her life".  (ABC News: Nick Dole)

Ms Ryburn, the former Northern Beaches deputy mayor, said she found that tactic upsetting.

"What hurt me the most was the relentless attacks on me not being a local," she said.

"I'm a proud fourth-generation Northern Beaches local."

"We have taken the high road and run a solid campaign.

"The teals, the most righteous of them all, slandered us in the media."

She also criticised Premier Chris Minns who she said had "not even bothered" to put up a Labor candidate.

Liberal leader Mark Speakman told the audience Ms Ryburn was a "candidate from heaven".

"We had a candidate of enormous courage [and] extraordinary energy," Mr Speakman said.

The party's failure to nominate candidates in local government elections and the resignation of the former Liberal MP, Mr Amon, had likely played into the result, Mr Speakman said.

Mr Speakman said he wanted to see Ms Ryburn in parliament.

"And if it transpires that it doesn't go our way here … the battle to regain Pittwater starts now," he said. 

He said the party had much to celebrate, having easily won the other by-elections in Epping and Hornsby.

Monica Tudehope will succeed former premier Dominic Perrottet in Epping, while James Wallace will fill the Hornsby seat vacated by former treasurer Matt Kean.

"Although we are facing an uphill battle in Pittwater, just remember our brand remains strong," Mr Speakman said.