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World Weather Online
The World's Most Reliable Weather API

What is World Weather Online?

World Weather Online is a comprehensive weather API platform that delivers accurate, real-time weather data for millions of global locations. The service provides developers and businesses with a complete suite of weather APIs including local weather forecasts, marine conditions, ski resort data, historical weather records, astronomy information, and time zone data. All data is delivered via RESTful endpoints in both JSON and XML formats with multilingual support for global applications.

The platform features industry-leading reliability with 99.99% uptime SLA and average response times under 300ms, making it suitable for mission-critical applications. It offers AI-powered accuracy for marine forecasts and integrates with AI agents through MCP (Model Context Protocol) servers, allowing AI assistants like Claude and Cursor to access weather data directly. The service includes a free tier for prototyping and scales to enterprise-grade deployments with flexible request plans.

Features

  • Real-Time Weather Updates: Live conditions from millions of global locations delivered in under 300ms
  • 15-Day Hourly Forecasts: Granular hourly and daily predictions up to 15 days out with 15-minute interval data
  • Historical Weather Data: Decades of past weather records available via API or bulk download
  • Marine Weather API: 7-day hourly marine forecasts with tides data and AI-powered accuracy
  • Ski & Mountain Weather API: Elevation-specific forecasts for ski resorts with snow, temperature, and wind data
  • Multilingual Support: Weather descriptions served in multiple languages from single API endpoints
  • AI Agent Integration: Available as MCP server for AI assistants like Claude and Cursor
  • Developer-Friendly Integration: RESTful endpoints with comprehensive documentation and code examples

Use Cases

  • Mobile and web weather applications
  • Airline and airport operational planning
  • Ski resort management and winter sports planning
  • Digital advertising and weather-triggered campaigns
  • Marine navigation and shipping operations
  • Agricultural planning and crop management
  • Travel and tourism applications
  • Research and data analysis projects

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