A new AI weather prediction system, developed by researchers from the University of Cambridge, can deliver accurate forecasts tens of times faster and using thousands of times less computing power than current AI and physics-based forecasting systems.
The system, Aardvark Weather, has been supported by the Alan Turing Institute, Microsoft Research and the European Centre for Medium Range Weather Forecasts. It provides a blueprint for a new approach to weather forecasting with the potential to transform current practices. The results are reported in the journal Nature.
"Aardvark reimagines current weather prediction methods offering the potential to make weather forecasts faster, cheaper, more flexible and more accurate than ever before, helping to transform weather prediction in both developed and developing countries," said Professor Richard Turner from Cambridge's Department of Engineering, who led the research. "Aardvark is thousands of times faster than all previous weather forecasting methods."
Current weather forecasts are generated through a complex set of stages, each taking several hours to run on powerful supercomputers. Aside from daily usage, the development, maintenance and use of these systems require significant time and large teams of experts.
More recently, research by Huawei, Google, and Microsoft has shown that one component of the weather forecasting pipeline, the numerical solver (which calculates how weather evolves over time), can be replaced with AI, resulting in faster and more accurate predictions. This combination of AI and traditional approaches is now being used by the European Centre for Medium Range Weather Forecasts (ECMWF).
But with Aardvark, researchers have replaced the entire weather prediction pipeline with a single, simple machine learning model. The new model takes in observations from satellites, weather stations and other sensors and outputs both global and local forecasts.
This fully AI driven approach means predictions that were once produced using many models - each requiring a supercomputer and a large support team to run - can now be produced in minutes on a desktop computer.
When using just 10% of the input data of existing systems, Aardvark already outperforms the United States national GFS forecasting system on many variables. It is also competitive with United States Weather Service forecasts that use input from dozens of weather models and analysis by expert human forecasters.
"These results are just the beginning of what Aardvark can achieve," said first author Anna Allen, from Cambridge's Department of Computer Science and Technology. "This end-to-end learning approach can be easily applied to other weather forecasting problems, for example hurricanes, wildfires, and tornadoes. Beyond weather, its applications extend to broader Earth system forecasting, including air quality, ocean dynamics, and sea ice prediction."
The researchers say that one of the most exciting aspects of Aardvark is its flexibility and simple design. Because it learns directly from data it can be quickly adapted to produce bespoke forecasts for specific industries or locations, whether that's predicting temperatures for African agriculture or wind speeds for a renewable energy company in Europe.
This contrasts to traditional weather prediction systems where creating a customised system takes years of work by large teams of researchers.
"The weather forecasting systems we all rely on have been developed over decades, but in just 18 months, we've been able to build something that's competitive with the best of these systems, using just a tenth of the data on a desktop computer," said Turner, who is also Lead Researcher for Weather Prediction at the Alan Turing Institute.
This capability has the potential to transform weather prediction in developing countries where access to the expertise and computational resources required to develop conventional systems is not typically available.
"Unleashing AI's potential will transform decision-making for everyone from policymakers and emergency planners to industries that rely on accurate weather forecasts," said Dr Scott Hosking from The Alana Turing Institute. "Aardvark's breakthrough is not just about speed, it's about access. By shifting weather prediction from supercomputers to desktop computers, we can democratise forecasting, making these powerful technologies available to developing nations and data-sparse regions around the world."
"Aardvark would not have been possible without decades of physical-model development by the community, and we are particularly indebted to ECMWF for their ERA5 dataset which is essential for training Aardvark," said Turner.
"It is essential that academia and industry work together to address technological challenges and leverage new opportunities that AI offers," said Matthew Chantry from ECMWF. "Aardvark's approach combines both modularity with end-to-end forecasting optimisation, ensuring effective use of the available datasets."
"Aardvark represents not only an important achievement in AI weather prediction but it also reflects the power of collaboration and bringing the research community together to improve and apply AI technology in meaningful ways," said Dr Chris Bishop, from Microsoft Research.
The next steps for Aardvark include developing a new team within the Alan Turing Institute led by Turner, who will explore the potential to deploy Aardvark in the global south and integrate the technology into the Institute's wider work to develop high-precision environmental forecasting for weather, oceans and sea ice.
Reference:
Anna Allen, Stratis Markou et al. 'End-to-end data-driven weather prediction.' Nature (2025). DOI: 10.1038/s41586-025-08897-0
Adapted from a media release by The Alan Turing Institute
