Google DeepMind’s WeatherNext 3 Goes Live in Search, Maps, and Gemini
On September 3, 2026, Google DeepMind launched WeatherNext 3, an AI weather model trained on live satellite and station observations with hourly 5 km surface fields, now powering Search, Gemini, Maps, and Cloud—Brightband’s live board called it the most accurate global AI weather model to date.
TLDR
Google DeepMind and Google Research on Thursday, September 3, 2026 published WeatherNext 3. Trained on live geostationary satellites + station observations, not 6-hour NWP lag. Hourly refresh; surface variables at 5 km (5× sharper than WeatherNext 2’s 25 km / 6-hour). Precip CRPS up to 60% vs IMERG, 30% MRMS, 10% gauges at early leads; consumer surfaces “up to 50% more accurate” precip, biggest gains in historically weak regions. Adds 100 m winds + solar radiation for renewables. Brightband live evals: most accurate global AI weather model to date. Live in Search, Gemini, Maps, Maps Platform Weather API, Earth Engine, BigQuery, GCS. Paper: arXiv:2609.03582.
Product-line de-dupe: not Gemini 3.8 Flash (Sep 2). Science/weather model, not a chat SKU.
Why this story matters
Weather is one of the few AI products users feel daily. A 5 km hourly model inside Search and Maps is distribution Google uniquely has. Watch: hurricane season verification, and whether Brightband stays #1 after the next ECMWF AI cycle.