The annual event celeb will be held from 8am to 4pm.
Meteorological Service director Arona Ngari said the open day would give people an idea of how weather reporting was done in the Cook Islands.
He said the event last year had been a success, adding they were hoping for a bigger turnout today.
“The open day will allow the public to have a look around the office of what we do and how we do it and some videos to clarify some of the activities we convey to the public,” Ngari said.
“We look forward to welcoming you to the Weather Office in Nikao.” The theme of this year’s World Meteorological Day is “weather-ready, climate-smart”.
In a statement, the World Meteorological Organisation said the ever-growing global population faced a wide range of hazards such as tropical cyclone storm surges, heavy rains, heatwaves, droughts and many more. Long-term climate change was increasing the intensity and frequency of extreme weather and climate events and causing sea level rise and ocean acidification, it said.
“Urbanisation and the spread of megacities means that more of us are exposed and vulnerable. Now more than ever, we need to be weather-ready, climate-smart and water-wise.
“This is why one of the top priorities of WMO and National Meteorological and Hydrological Services (NMHSs) is to protect lives, livelihoods and property from the risks related to weather, climate and water events.
Thereby, WMO and its Members support the global agenda on sustainable development, climate change adaptation and disaster risk reduction.”
WMO says early warning systems and other disaster risk reduction measures are vital for boosting the resilience of at-risk communities.
“Climate services can inform decisions on both climate change mitigation and adaptation. Hydrological monitoring increases our understanding of the water cycle and so supports water management.”