msleigh

ECMWF's OpenIFS weather forecasting model is now fully open source on GitHub.

OpenIFS is a version of the same system used to produce our operational forecasts. After 15 years of licensed access, it's now genuinely open - publicly available with an Apache 2 licence.

https://github.com/ecmwf-ifs/openifs

Mar 5 at 8:11amWeb
Show threadmsleighMar 5
We've gradually made some components of the IFS open-source over recent years, such as the radiation scheme (https://github.com/ecmwf-ifs/ecrad), wave model, and land-surface model. But now we're able to release the full forecast model - no licence, no restrictions. (No data assimilation either though.)
Show threadmsleighMar 5
See our news item: https://www.ecmwf.int/en/about/media-centre/news/2026/openifs-open-source
ECMWF’s portable global forecasting model OpenIFS now available for all

OpenIFS is now open source, expanding global access, accelerating innovation and strengthening collaboration.

ECMWF