@liam-pankhurst I've also made a post about adding BoM data into Windy (below).
I've been looking into the possibility of adding weather data from the Australian BoM service into the Windy service and have come across these web pages from the BoM.
It does seem that a lot of data is free to use from the below links (which is great!).
FTP Public products:
http://www.bom.gov.au/catalogue/anon-ftp.shtml
and
http://www.bom.gov.au/catalogue/data-feeds.shtml
It also seems that Windy can use the data without any cost:
http://www.bom.gov.au/metadata/catalogue/license.shtml
BoM also seems to make the Himawari-8 satellite data free to use.
http://www.bom.gov.au/catalogue/data-feeds.shtml#satellite
I'm assuming this is how WillyWeather distributes its forecasting using BoM data:
https://www.willyweather.com.au/nsw/sydney/sydney.html
It would be AMAZING to have here in Australia the BoM forecast along side the ECMWF, GFS, ICON and Meteoblue forecasts.
Another good point to add BoM data is that it has a global forecast called:
ACCESS-G Global (approx 25km) 6 hourly to 240 hours (10 days).
ACCESS-R Regional (approx ~12km) 3 hourly to 72 hours (3 days).
ACCESS-C+ Cities (approx ~4km) 1 hourly to 36 hours (1.5 days)
http://www.bom.gov.au/australia/charts/about/about_access.shtml