NOAA Weather.gov API

The National Weather Service (NWS) API provides free, open access to weather forecasts, alerts, observations, radar data, and more for the United States. All data is public domain — no API key or account required.

Always check the official API documentation and OpenAPI spec for the latest endpoint details.

Base URL

https://api.weather.gov

Authentication

No API key is needed. However, a User-Agent header is required on every request to identify your application.