Worldwide real-time solar irradiance data

A sample of Solcast’s high-resolution solar irradiance data in Texas

Live solar irradiance data, available globally through a flexible API framework that’s fast, easy and free to try.

Solcast tracks the Earth’s cloud cover by combining a wide array of unique datasets - including satellite imagery, weather models and aerosol datasets - so you don’t have to. Use our API Toolkit to access solar irradiance estimates in real-time.

Solcast delivers operational solar irradiance data around the world

Our forecasting data are utilised by more than 24,000+ unique users. We also feature a global network of high-profile partnerships to deliver 24/7 support and bespoke contracts

Global Enterprise Partnerships

North America, China, Vietnam




South America




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Solcast API Toolkit

Access real-time solar irradiance data within minutes by creating your free API Toolkit account.

Download solar radiation data from just moments ago, reaching back 7 days in the past in CSV, JSON or XML format for your areas of interest. No credit card required. No commitment to buy. Just instant access.

We crunch gigabytes of satellite data on the fly in just seconds to deliver you the latest solar irradiance data

We built an entirely new approach to solar irradiance modelling using the latest in high-resolution weather satellites, machine learning, computer vision and big data. We crunch nearly 10TB of input data every month in a cloud-based environment on AWS and provide real-time access to our data via API. Our Live solar irradiance data products include:

  • Solar irradiance data (GHI, DNI, Diffuse)
  • Available from real-time through 7 days ago
  • Global coverage (all six major continents)
  • Rapid update (new irradiance data every 5-15 minutes)
  • Exceptionally low latency (tens of seconds for computation)
  • Proprietary cloud & aerosol detection (tracking smoke, dust, haze)
  • High-resolution data (1-2km)
  • Choose between 5/10/15/30 minute resolution
  • Delivered via REST API (download CSV, JSON or XML)
  • Historical datasets available for up to 20 years
Solcast API Toolkit

Access real-time solar irradiance data in our API Toolkit

Learn about our technology

Live & forecast data APIs for data access Pricing information Methodology

Or, access solar irradiance data at your areas of interest straight away

Create your free API Toolkit account, and we will provide you with 10 free requests per day for each real-time solar radiation site you create. No commitment required, just instant access to the latest high quality solar irradiance data, wherever you need it.