New polling commissioned by GetUp suggests former prime minister Tony Abbott is on track for a defeat by independent candidate Zali Steggall in his blue ribbon Sydney seat of Warringah.

A Lonergan poll of 805 Warringah voters shows Mr Abbott trailing Ms Steggall 56-44 on a two party-preferred basis. GetUp is campaigning against Mr Abbott in Warringah.

The poll also showed climate change and the environment is a top-order issue for Warringah voters.

Ms Steggall, an Olympic skier-turned-barrister, has put combating climate change at the centre of her campaign and says the Morrison government has failed to act on emissions reduction or encouraging the renewable energy transition.