Get improved weather forecast data access via APIs

re.alto offers access to a broad range of standardised weather forecast packages – from temperature and humidity to wind speed and irradiation data – all tailormade to the energy sector. A simple discovery and API integration process delivers maximum agility in a complex market, enabling forecast sources to be matched to constantly changing portfolio needs.

re.alto energy

Top weather forecasting APIs on our marketplace

re.alto weather data

Solar data


Founded in 2010, Solargis provides data to optimise the construction, evaluation and management of solar power assets, as well as maximising profitability for investors. The Solargis API offers some of the most accurate and reliable solar data in the market today.  

Weather and environmental data


Meteomatics delivers fast and simple access to an extensive range of global weather and environmental data. Its weather API offers a single entry point to a vast range of highly accurate data from global weather forecasts to local observations. 

re.alto market pricing data

Modelling & forecasting data

Energy Quantified

Energy Quantified is a leading provider of high-quality pan-European data and market intelligence, setting the standard for modelling and forecasting of the short-term power market.

Weather forecasting use cases

Energy Trader or Grid Operator

  • Navigate the confusing jungle of forecast provider options thanks to simple product descriptions and technical details
  • Switch to the best weather forecast provider to fit your updated portfolio with just a few clicks, saving both time and money
  • Integrate the forecast data in minutes with our straightforward overview of API standards and OpenAPI documentation

Power generator (renewables)


  • Effortlessly link wind or irradiation forecasts to production forecasting by accessing providers who can offer you a direct power forecast of your site with your type of installation
  • Explore the available weather data options which offer a long-term view, essential for project bankability and cash flow forecasting

Analytics, modelling and forecasting

  • Access weather data to fuel algorithms or forecast load and generation behaviour when modelling grid power flows
  • Embed weather forecasts in API format easily into an energy management system or smart device

Wind SCADA data


Smart charging e-mobility


Weather forecasting data


Spot market pricing


Smart meter access


Energy monitoring 2.0

Why re.alto?


Create innovative data-driven products, make smarter decisions, and gain value from digital services.


Search and Discover

One central hub enabling the easy discovery and integration of energy-related API products.


Browse documentation, test APIs, and copy code snippets. Manage all of your subscriptions from one central place.

Simple Billing and Transactions

Providers set permissions and manage API pricing. re.alto manages invoicing and payments. 

Reporting and Analytics

Monitor and manage API usage and API subscriptions in your account portal.


Digital contract management

Contract management between provider and consumer is taken care of with a click of a button.  No more complex bureaucracy.