More than 100 people have taken part in a demonstration outside Leinster House in Dublin calling for an end to the use of fossil fuels.
Fridays for Future activists, along with other climate groups, gathered at Grand Canal Dock station before marching to Kildare Street.
The march is part of a worldwide student movement demanding that politicians take stronger and more urgent action on climate change.
It is inspired by Swedish activist Greta Thunberg, and the Dublin organisation starting holding protests outside the Dáil in January 2019.
Fridays for Future climate justice activist Victoria Ivory said that we have seen this summer, "globally and in Ireland, the disastrous consequences of the continuous investment in fossil fuels, with the world experiencing the hottest month on record in July along with countless climate disasters".
"It is frightening as a young person to know that this is only going to continue to get worse year by year," she added.
"If this summer doesn't make politicians and fossil fuel investing corporations wake up then I don't know what will. We need radical action now."
Tens of thousands of climate activists around the world are taking part in protests this weekend calling for an end to the burning of fossil fuels as the planet suffers dramatic weather extremes and record-breaking heat.
Last week, the United Nations warned that countries are way off track to curb warming to 1.5C since pre-industrial times, as agreed in Paris in 2015. The world has warmed at least 1.1C since then.
Over the past few months, Earth broke its daily average heat record several times according to one metric, July was the hottest month recorded, and the Northern Hemisphere summer was declared the hottest on record.
In one protest - in Quezon City in the Philippines - activists lay in front of the department of environment and natural resources in protest, and held signs demanding fossil fuels – from coal to natural gas – be phased out.
Outside the ministry of energy and mineral resources office in Jakarta, Indonesia, protesters raised signs calling for end to dirty fuels and greenwashing as police officers looked on.
In Sweden, climate activists gathered in front of parliament, next to the Royal Palace where Sweden’s King Carl XVI Gustaf was celebrating his 50th anniversary on the throne.
Their chants about "climate justice" could be heard in the palace courtyard as the king watched the changing of the guard during the golden jubilee celebrations.
Dozens of extreme weather events - from Hurricane Idalia in the south-eastern United States to torrential flooding in Delhi in India - are believed to have been made worse by human-caused climate change.
Another major strike is planned to take place on Sunday in New York, to coincide with the city’s Climate Week and the UN climate summit.
Activists have organised similar worldwide strikes in recent years, where protesters from different nations join together on a single day.
Additional reporting PA
