The Solcast API is a solar radiation and solar energy forecasting data service that is designed to be easy to use and to integrate with other systems that are looking for live solar radiation and solar PV energy output data.
Best Professional weather forecast API accurate historical data and forecasts API uses data from the model GFS a resolution of 0.25 deg. 384 hours 16 days. World Wide Weather forecast current weather app real-time weather forecasts anywhere. Professional forecast agronomists, wind energy, solar energy, pilots.
Helioviewer is an open-source project for the visualization of solar and heliospheric data, funded by ESA and NASA.