Live & forecast data: Tracking the world’s cloud cover in real-time
Solcast forecasts solar irradiance and PV power from +5 minutes to 7 days ahead, worldwide, and our live data are available in real-time, through the past 7 days. All delivered via API and available for instant access through our API Toolkit.
‘Global Coverage’ is one of the features that sets Solcast apart from the competition, with data available on every major continent. The other is ‘Rapid Update’, where we update our live and forecast data as frequently as every 5 minutes, crunching more than 600 million new solar predictions every hour.
Solcast’s live and forecast data services are trusted by 14,000+ unique users around the world, including:
How do we create our live and forecast data?
By combining imagery from five geostationary weather satellites, which image the globe at a spatial resolution as fine as 1 kilometer, we geo-code, quality control and compute solar irradiance estimates worldwide. We refresh these estimates every 5-15 minutes, and in a matter of tens of seconds make them available via API.
This API service features two key data categories - ‘Live’ and ‘Forecast’. Live data is a snapshot of what is happening now (real-time) through the past 7 days. Forecast data is a prediction of what will occur next, starting as little as five-minutes ahead, through 7-days in the future. Both data categories receive Rapid Update data every 5-15 minutes with each new satellite scan.
See the animation below for an example of how we track and forecast the movement of clouds. At left, Solcast’s live cloud opacity measurements over the United Kingdom. At right, a sample forecast, issued at the start of the animation and reaching out to two hours ahead. In this example, data from each of our 18 nowcasting ensemble members is included. All of our forecasts are ‘probabilistic’, and include a P50, P10 and P90 scenario.
Live and Forecast Data - What’s Available?
Our datasets are updated every 5-15 minutes on a Rapid Update cycle, delivering you the latest live and forecast data within a few tens of seconds of Solcast receiving the latest satellite imagery.
- Solar irradiance data (GHI, DNI, Diffuse)
- PV power modelling (Rooftop or Utility Scale)
- Global coverage (all six major continents) at 1-2km resolution
- Rapid Update (new live and forecast data every 5-15 minutes)
- Proprietary cloud & aerosol detection (tracking smoke, dust, haze)
- Probabilistic forecasting outputs
- From 5 minutes through 7 days ahead at 5/10/15/30 minute resolution
- Delivered via REST API (download CSV, JSON or XML)
Live and Forecasts Data Products
Solar Irradiance Data
Forecast and real-time solar irradiance and weather data with global coverage and built-in accuracy reporting
Solar power forecasting via API with sky camera integration. Includes access to our high resolution solar radiation data.
Rooftop PV Forecasts
Solar power forecasting for installations below 1MW in size. Includes free access for your home PV system.