Team up with earth sciences, computer science or artificial intelligence & machine learning experts to develop innovative open source software

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Code for Earth Final Day highlights

On 25 September, we’ve wrapped up Code for Earth 2025 with a full day of demos, reflections, and climate tech in action, and we closed off this edition of Code for Earth. Watch all the presentations!

The voices behind the innovation

Get a closer look at the people behind Code for Earth 2025! The interviews feature participants and mentors reflecting on their projects, challenges, and what they’ve built during the programme.

About Code for Earth

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, atmosphere, and climate, Copernicus and Destination Earth (DestinE). Learn more about ECMWF, Copernicus Climate Change Service (C3S), Copernicus Atmosphere Monitoring Service (CAMS) and DestinE.

Since 2018, each summer, selected 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.

How it works

From the Call for participation to the Final Code for Earth Day

Step 1

Call for participation

12 February - 30 March
Browse through the Code for Earth 2026 challenges on GitHub. Ask questions and together with mentors, you can tailor your submission. Submit your proposal by 30 March 2026.
Step 2

Announcement of selected proposals

April 2026
The Code for Earth 2026 teams will be announced in April 2026. You can follow Code for Earth on LinkedIn, BlueSky, and subscribe to the newsletter to get all updates.
Step 3

Coding phase

May - August 2026
The four-month long coding period starts in May 2026 and ends in 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.
Step 4

The Final Code for Earth Day

September 2026 - Bologna, Italy
The Code for Earth Day is a celebratory completion of the programme. This year the event will be hosted at ECMWF's offices in Bologna, Italy. Teams will be invited to present their project results.

The organisations we partnered with this year

to develop unique joint challenges, which serve not only as a call to action for problem-solvers but also as a testament to the power of collaboration

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