National Weather Service

API

Free US government API for weather forecasts, alerts and observations

Price: Free
Access: None, send a User-Agent

Docs
OpenAPI

About

Public API from the US National Weather Service for forecasts, alerts and station observations. It is free for any use and needs no key, only a User-Agent header. Coverage is limited to US states, territories and marine zones.

What you can do with it

Get 12-hour and hourly forecasts for a latitude and longitude
Fetch active weather alerts for a US state
Read the latest observations from weather stations

Get started

Send a User-Agent that identifies your app
Call /points for a location to get its forecast URLs

Example

curl -H "User-Agent: (myweatherapp.com, contact@myweatherapp.com)" \
  https://api.weather.gov/points/39.7456,-97.0892

Details

Hosting: Hosted service
Available in: 9 countries
American Samoa, Guam, Marshall Islands, Micronesia, Northern Mariana Islands, Palau, Puerto Rico, U.S. Virgin Islands, United States
MCP server: None