Dark clouds threatened rain as schoolkids gathered outside the Sydney electorate offices of both Labor and Liberal politicians on Friday, but it didn't dampen their message on climate change.

Prime Minister Scott Morrison, former prime minister Tony Abbott and Labor infrastructure spokesman Anthony Albanese were among those targeted as part of the nationwide protest against climate change inaction by federal MPs.

School children at a climate change protest near the office of Tony Abbott in Manly. Credit:Kate Geraghty

The protest held extra potency in Manly, where Mr Abbott's 25-year grip on the seat of Warringah is under threat from independent candidate Zali Steggall in a campaign centred on climate change.

Armed with homemade signs, about a hundred students, parents and grandparents marched on Mr Abbott's Manly office, chanting the slogan favoured by Steggall supporters: "Time's up Tony".