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 11,000+ unique users. We also feature a global network of high-profile partnerships to deliver 24/7 support and bespoke contracts

Selected customer profiles:

EPRI

Headquarters:Palo Alto, California
Core business:Energy research and development
Employees:>1,000

Global Enterprise Partnerships

North America, China, Vietnam

AccuWeather

Australia

WeatherZone

South America

ClimaTempo

Taiwan

WeatherRisk

Featured in

PV Tech
Solar Industry Magazine
Utility Magazine
Energy Magazine
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.

Free access to the data

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 calls 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.

Free access to the data