Introduction

Evaluate Data AccessTesting the Solcast data API

Getting Started

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User Guides

What is an API? What is an API key? How do I use my API key?What is an API request? How many API requests do I need?Best Practices

Solcast Products

Modelling

Modelling - FAQs

Resolution and Accuracy

Solar Radiation Forecasting and Historical DataGlobal Coverage

Solcast API

Hobbyists and Researchers

Troubleshooting and FAQs

FAQs

Troubleshooting Data Errors

Useful Links

Postman API (Spec) Documentation

Python SDK

API Change Log

Subscription Management

Historical forecasts are not archived

While we don't store old forecasts, Solcast provides forecasting solar data with proven accuracy levels. Learn how you can access them.

Can I access old forecasts? Do you have old forecasts archived? How do I see past forecast data? How accurate are your forecasts?

We do not store our forecasts.

This is simply because of the incredible volume of forecasts we generate - 600 million each hour!

If you are interested in forecasting accuracy, there are a few things you can do:

1. Use the API Toolkit to create a site at your location of interest and then review the 'accuracy' chart which has the 1-hour ahead forecasts for the past 7 days archived. 2. Use the API Toolkit to create a site at your location of interest and begin downloading the forecast data regularly for your own comparison. 3. If you need these data for a project and have budget available, we can offer one-off forecast extracts for you at cost. Get in touch with us to learn more!

• Historical forecasts are not archived