Google says WeatherNext 3 rollout began across its weather products

Google DeepMind and Google Research introduced WeatherNext 3 as a global weather AI model. Google says it uses recent satellite observations alongside historical analysis to provide more frequently refreshed forecasts. The announcement attributes its position as the company's most advanced and accurate global weather model to independent live evaluations by Brightband. Those descriptions and the evaluation reference have not been independently assessed in the supplied material. [1]

Google reports precipitation-score improvements of up to 60% against IMERG, 30% against MRMS and 10% against rain-gauge measurements at early lead times. Separately, it says forecasts for a day or more ahead can provide up to 50% more accurate precipitation predictions, with the largest improvements in regions where forecasting has historically been less reliable. These are Google-reported performance claims. The post links to a paper and Brightband leaderboards, but their contents were not provided in the evidence packet. [1]

Google says WeatherNext 3 will begin powering weather experiences globally in Google Search, the Gemini app, Google Maps, the Google Maps Platform Weather API and Google Earth Engine starting on 3 September 2026. It also says global forecast data, updated hourly, can be queried in BigQuery and Earth Engine or bulk-downloaded from Google Cloud Storage. [1]

This is an explicit first-party statement of a global rollout start, not confirmation that every listed product has identical features or that access is already uniform everywhere. The announcement does not give a completion timetable, identify geographic exceptions, or state which accounts, plans or interfaces receive particular WeatherNext 3 capabilities. [1]

Google's post supplies claims about forecast frequency, resolution and accuracy, and it points readers to a paper and independent Brightband live leaderboards. However, the supplied packet contains neither the contents of that paper nor the leaderboard records or methodology. It therefore does not independently establish performance for a particular location, weather event, forecast horizon or Google interface. [1]

Google states that official weather forecasts, severe-weather warnings and public-safety advisories should come from local meteorological agencies or national weather services. The post does not describe how WeatherNext 3 outputs are presented alongside, distinguished from, or connected to those official services across the products named in the rollout. [1]