Your Dark Sky alternative. A global cloud tracking and weather forecasting API

Solcast global cloud and solar irradiance technology in action. We update our data every 5-15 minutes.

Solcast tracks and forecasts individual cloud features using imagery from five weather satellites.

We provide access to solar radiation and cloud cover data in one easy to use API. Our offering includes free access for homeowners with rooftop solar.

Solcast delivers operational solar forecasting data around the world

Our forecasting data are utilised by 30+ enterprise clients and more than 6,000 unique users. In addition to our paid offering, we also provide free access to researchers and solar enthusiasts for non-commercial use.

Selected customer profiles:

EPRI

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

Featured in

PV Tech
Solar Industry Magazine
Utility Magazine
Energy Magazine
Solcast API Toolkit

Try our solar irradiance and PV forecasting data though the Solcast API Toolkit. No credit card required. Instant access.

Free access to the data

Solar and weather forecasting technology… in the cloud

We built a new approach to cloud and solar forecasting 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, including:

  • Solar irradiance data (GHI, DNI, Diffuse)
  • Cloud cover (cloud opacity)
  • Key weather parameters (e.g. temperature)
  • PV power modelling (Rooftop or Utility Scale)
  • Global coverage (all six major continents)
  • Rapid update (new forecasting data every 5-15 minutes)
  • Proprietary cloud & aerosol detection (tracking smoke, dust, haze)
  • High-resolution data (1-2km)
  • Forecasts from 5 minutes through 7 days ahead
  • Choose between 5/10/15/30 minute resolution
  • Delivered via REST API (download CSV, JSON or XML)
Solcast API Toolkit

Access cloud, solar and weather forecasting data in our API Toolkit

Learn about our technology

Solar and cloud forecasting Learn about our API Pricing information Methodology

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

Create your free API Toolkit account, and we will provide you with 1000 free API calls, plus an additional 10 free calls per day for each forecasting site you create. No commitment required, just instant access to the latest high quality, high resolution predictions of solar irradiance and PV power data, wherever you need it.

Free access to the data