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ECMWF Code for Earth is an innovation programme run by the European Centre for Medium-Range Weather Forecasts (ECMWF). Its aim is to drive innovation and open source developments in the Earth sciences community - supporting developments in weather and climate, the two Copernicus services (Copernicus Climate Change Service and Copernicus Atmosphere Monitoring Service), Destination Earth and the EU’s Africa Regional Centres of Excellence Programme (ArcX), in line with the EU’s Global Gateway strategy.
In 2026, the programme is further strengthened through support from key challenge partners — ENTSO‑E, AfriClimate AI, and ICPAC/IGAD Climate Prediction and Application Centre.
Since 2018, each summer, developer teams work together with experienced mentors from ECMWF and partner organisations on innovative projects. These projects are related to the broad scope of activities at ECMWF, including data science, weather, climate or other earth sciences, visualisation and more. For eligibility of participation, please check the Code for Earth Terms & Conditions.
Congratulations to all the teams that have been selected to be part of Code for Earth 2026:
Browse through the Code for Earth 2026 challenges and ask questions. Together with ECMWF mentors, you can tailor your submission. Submit your proposal by 9 April 2026. For eligibility of participation, please check the Code for Earth Terms & Conditions.
The Code for Earth 2026 teams will be announced on 29 April 2026. You can follow Code for Earth on Linkedln and Bluesky and subscribe to the newsletter to get all updates.
The four-month long coding period starts on 01 May 2026 and ends on 31 August 2026. During this time, the selected teams will work with their Code for Earth mentors. These are experts in earth sciences like weather, climate and climate change, atmosphere and air quality or in technology areas like AI/ML, cloud computing, applied data science or open source software development.
The Code for Earth Final Day is a celebratory completion of the programme. This year the event will be hosted at ECMWF's Headquarters in Reading, UK. Teams will be invited to present their project results.