Need solar data or forecasts? We’ve got the world covered

Solar resource assessment and forecasting data for irradiance and PV power. Created using a global fleet of weather satellites. Independently validated. Free to try. Access our data in just a few minutes with the Solcast API Toolkit.

Solar data services… in the cloud

We built a new approach to solar forecasting and modeling technology from the ground up, using the latest in weather satellite imagery, machine learning, computer vision and big databases. We crunch more than 600 million new forecasts every hour in a cloud-based environment on AWS and provide real-time access to our data via API. Use the API Toolkit to access nearly 20 years of historical data, including TMY files.

Historical and TMY Data

  • Low uncertainty, zero bias, bankable dataset
  • Independent validation & global coverage
  • High resolution 2km data at 5minute resolution
  • PV modelling software integration (PVSyst, SAM, TMY3, CSV)
  • Solar irradiance (GHI, DNI, DHI)
  • Weather (Temp, Wind, Humidity, Snow, etc)
  • Includes aerosol impacts (tracking of smoke, dust, haze)

Live and Forecast Data

  • Solar irradiance data (GHI, DNI, Diffuse)
  • Weather (Temp, Wind, Humidity, Snow, etc)
  • PV power modelling (Rooftop or Utility Scale)
  • Global coverage (all six major continents) at 2km resolution
  • Rapid update (new forecasting data every 5-15 minutes)
  • Proprietary cloud & aerosol detection (tracking smoke, dust, haze)
  • Probabilistic forecasting outputs
  • Real-time data through to 14 days ahead at 5, 10, 15, 30 & 60 minute resolution
  • Delivered via REST API (download CSV or JSON)

Try it for free, no credit card required.

Learn more about our data

Latest Posts

2023 delivers best year this century for irradiance
Solcast analysis has revealed that 2023 was the sunniest year of the century, with many regions experiencing irradiance levels 10% or more above long-term trends.
Solcast historical data bankability, validated by DNV
Solcast achieves a significant milestone with DNV's validation of its satellite irradiance data, proving its bankability across more than 200 sites worldwide. Learn how this could improve your solar projects.
April total eclipse to impact solar generation from Mexico to New England
On April 8, a total eclipse will pass from Mexico, across Texas, and up the East Coast. With the increasing solar capacity in the US, the grid impact of major solar events is also growing. Explore our early forecast on how the eclipse will impact US grids.