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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 data: Up to 5 minute / 90 metre 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)
- Accessible bankable data source for resource assessment
via DNV's Solar Resource Compass
200GW+
Assets supported
Live and Forecast Data
- Solar irradiance data (GHI, DNI, Diffuse)
- Weather (Temp, Wind, Humidity, Snow, etc)
- PV power modelling (Rooftop or Utility Scale)
- Fully-global coverage
- 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)
Learn more about our data
Latest Posts
Forecasts predict strong solar performance for rest of 2025 in Europe, North America
Seasonal models show strong solar irradiance forecasts for Europe and North America in H2 2025, while other global regions face mixed or poor trends.
High-pressure systems boost global solar irradiance in early 2025
Early 2025 brought sunnier skies to Europe, China, and western North America, while Southeast Asia and Canada saw cloudier conditions.
Solesca integrates Solcast data for faster, more accurate solar design
Solcast’s high resolution solar data is now embedded in Solesca, enabling faster, smarter, and more accurate solar asset design, all in one platform.