Weather — entry 026 of 31

US Weather

Verified Jul 2026

The National Weather Service API serves official US government forecasts, active alerts, and observation-station data as GeoJSON and JSON-LD feeds, with no signup or API key required. It's widely used by third-party weather apps and accepts direct browser calls, though it requires a descriptive User-Agent header identifying your application on every request.

forecastalertsgovernmentobservationsgeojson

Visit weather.gov ↗More Weather

AuthenticationNone requiredCall it straight away — no key, no signup.

HTTPSSupportedTraffic is encrypted in transit.

CORSEnabledCallable directly from browser JavaScript.

PricingFreeNo paid tier — free for the documented use case.

FormatsGeoJSON, JSON-LD, CAP/XML, DWML/XML, ATOMResponses can be requested as GeoJSON or JSON-LD or CAP/XML or DWML/XML or ATOM.

GreatAPIs Score

Score100out of 100

Authentication25/25No authentication required

Pricing20/20Free to use

Docs20/20Machine-readable spec file bundled

Formats15/15Supports 5 response formats

Freshness20/20Verified within 6 months

Embed this badge

<a href="https://greatapis.com/api/us-weather/"><img src="https://greatapis.com/badge/us-weather.svg" alt="Scored 100 on greatapis.com"></a>

Auth quickstart

No key needed — call it now.

Stored keyNo key stored

Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.

Endpoints

Servers

https://api.weather.gov

Auth

userAgentapiKeyAuth

alerts8

GET/alerts

Parameters

Name	In	Required	Type
`active`	query	no	boolean

Responses

Status	Description	Schema
`200`	—	—
`301`	Certain common queries may be redirected to discrete URLs	—
`default`	—	—

GET/alerts/active

Responses

Status	Description	Schema
`200`	—	—
`301`	Certain common queries may be redirected to discrete URLs	—
`default`	—	—

GET/alerts/active/area/{area}

Parameters

Name	In	Required	Type
`area`	path	yes	—

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/alerts/active/count

Responses

Status	Description	Schema
`200`	A data structure showing the counts of active alerts broken down by various categories	—
`default`	—	—

GET/alerts/active/region/{region}

Parameters

Name	In	Required	Type
`region`	path	yes	—

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/alerts/active/zone/{zoneId}

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/alerts/types

Responses

Status	Description	Schema
`200`	A list of recognized event types	—
`default`	—	—

GET/alerts/{id}

Parameters

Name	In	Required	Type
`id`	path	yes	—

Responses

Status	Description	Schema
`200`	An alert record	`AlertGeoJson`
`default`	—	—

aviation7

GET/aviation/cwsus/{cwsuId}

Responses

Status	Description	Schema
`200`	success	`CenterWeatherServiceUnitJsonLd`
`default`	—	—

GET/aviation/cwsus/{cwsuId}/cwas

Responses

Status	Description	Schema
`200`	success	`CenterWeatherAdvisoryCollectionGeoJson`
`default`	—	—

GET/aviation/cwsus/{cwsuId}/cwas/{date}/{sequence}

Parameters

Name	In	Required	Type
`sequence`	path	yes	integer

Responses

Status	Description	Schema
`200`	success	`CenterWeatherAdvisoryGeoJson`
`default`	—	—

GET/aviation/sigmets

Parameters

Name	In	Required	Type
`atsu`	query	no	—
`sequence`	query	no	—

Responses

Status	Description	Schema
`200`	success	`SigmetCollectionGeoJson`
`default`	—	—

GET/aviation/sigmets/{atsu}

Responses

Status	Description	Schema
`200`	success	`SigmetCollectionGeoJson`
`default`	—	—

GET/aviation/sigmets/{atsu}/{date}

Responses

Status	Description	Schema
`200`	success	`SigmetCollectionGeoJson`
`default`	—	—

GET/aviation/sigmets/{atsu}/{date}/{time}

Responses

Status	Description	Schema
`200`	success	`SigmetGeoJson`
`default`	—	—

glossary1

GET/glossary

Responses

Status	Description	Schema
`200`	A set of glossary terms	—
`default`	—	—

gridpoints4

GET/gridpoints/{wfo}/{x},{y}

Responses

Status	Description	Schema
`200`	Gridpoint forecast data	`GridpointGeoJson`
`default`	—	—

GET/gridpoints/{wfo}/{x},{y}/forecast

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/gridpoints/{wfo}/{x},{y}/forecast/hourly

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/gridpoints/{wfo}/{x},{y}/stations

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

icons3

GET/icons

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/icons/{set}/{timeOfDay}/{first}

Parameters

Name	In	Required	Type
`set`	path	yes	string
`timeOfDay`	path	yes	string
`first`	path	yes	string
`size`	query	no	—
`fontsize`	query	no	integer

Responses

Status	Description	Schema
`200`	success	`BinaryFile`
`default`	—	—

GET/icons/{set}/{timeOfDay}/{first}/{second}

Parameters

Name	In	Required	Type
`set`	path	yes	string
`timeOfDay`	path	yes	string
`first`	path	yes	string
`second`	path	yes	string
`size`	query	no	—
`fontsize`	query	no	integer

Responses

Status	Description	Schema
`200`	success	`BinaryFile`
`default`	—	—

offices8

GET/offices/{officeId}

Responses

Status	Description	Schema
`200`	success	`Office`
`default`	—	—

GET/offices/{officeId}/briefing

Responses

Status	Description	Schema
`200`	success	`OfficeBriefing`
`default`	—	—

GET/offices/{officeId}/briefing/download/latest

Responses

Status	Description	Schema
`302`	success	—
`default`	—	—

GET/offices/{officeId}/briefing/download/{briefingId}

Parameters

Name	In	Required	Type
`briefingId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`BinaryFile`
`default`	—	—

GET/offices/{officeId}/headlines

Responses

Status	Description	Schema
`200`	success	`OfficeHeadlineCollection`
`default`	—	—

GET/offices/{officeId}/headlines/{headlineId}

Parameters

Name	In	Required	Type
`headlineId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`OfficeHeadline`
`default`	—	—

GET/offices/{officeId}/weatherstories

Responses

Status	Description	Schema
`200`	success	`OfficeWeatherStoryCollection`
`default`	—	—

GET/offices/{officeId}/weatherstories/download/{imageId}

Parameters

Name	In	Required	Type
`imageId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`BinaryFile`
`default`	—	—

points3

GET/points/{latitude},{longitude}

Responses

Status	Description	Schema
`200`	success	`PointGeoJson`
`default`	—	—

GET/points/{latitude},{longitude}/radio

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/points/{latitude},{longitude}/stations

Responses

Status	Description	Schema
`301`	redirect to gridpoint stations	—
`default`	—	—

products9

GET/products

Parameters

Name	In	Required	Type
`location`	query	no	array
`start`	query	no	string
`end`	query	no	string
`office`	query	no	array
`wmoid`	query	no	array
`type`	query	no	array
`limit`	query	no	integer

Responses

Status	Description	Schema
`200`	success	`TextProductCollection`
`default`	—	—

GET/products/locations

Responses

Status	Description	Schema
`200`	success	`TextProductLocationCollection`
`default`	—	—

GET/products/locations/{locationId}/types

Parameters

Name	In	Required	Type
`locationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProductTypeCollection`
`default`	—	—

GET/products/types

Responses

Status	Description	Schema
`200`	success	`TextProductTypeCollection`
`default`	—	—

GET/products/types/{typeId}

Parameters

Name	In	Required	Type
`typeId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProductCollection`
`default`	—	—

GET/products/types/{typeId}/locations

Parameters

Name	In	Required	Type
`typeId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProductLocationCollection`
`default`	—	—

GET/products/types/{typeId}/locations/{locationId}

Parameters

Name	In	Required	Type
`typeId`	path	yes	string
`locationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProductCollection`
`default`	—	—

GET/products/types/{typeId}/locations/{locationId}/latest

Parameters

Name	In	Required	Type
`typeId`	path	yes	string
`locationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProduct`
`default`	—	—

GET/products/{productId}

Parameters

Name	In	Required	Type
`productId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`TextProduct`
`default`	—	—

radar8

GET/radar/profilers/{stationId}

Parameters

Name	In	Required	Type
`stationId`	path	yes	string
`time`	query	no	—
`interval`	query	no	—

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/queues/{host}

Parameters

Name	In	Required	Type
`host`	path	yes	string
`limit`	query	no	integer
`arrived`	query	no	—
`created`	query	no	—
`published`	query	no	—
`station`	query	no	string
`type`	query	no	string
`feed`	query	no	string
`resolution`	query	no	integer

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/servers

Parameters

Name	In	Required	Type
`reportingHost`	query	no	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/servers/{id}

Parameters

Name	In	Required	Type
`id`	path	yes	string
`reportingHost`	query	no	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/spgds

Parameters

Name	In	Required	Type
`published`	query	no	—

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/stations

Parameters

Name	In	Required	Type
`stationType`	query	no	array
`reportingHost`	query	no	string
`host`	query	no	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/stations/{stationId}

Parameters

Name	In	Required	Type
`stationId`	path	yes	string
`reportingHost`	query	no	string
`host`	query	no	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/radar/stations/{stationId}/alarms

Parameters

Name	In	Required	Type
`stationId`	path	yes	string

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

radio1

GET/radio/{callSign}/broadcast

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

stations7

GET/stations

Parameters

Name	In	Required	Type
`id`	query	no	array
`state`	query	no	array

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/stations/{stationId}

Responses

Status	Description	Schema
`200`	success	`ObservationStationGeoJson`
`default`	—	—

GET/stations/{stationId}/observations

Parameters

Name	In	Required	Type
`limit`	query	no	integer

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/stations/{stationId}/observations/latest

Parameters

Name	In	Required	Type
`require_qc`	query	no	boolean

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/stations/{stationId}/observations/{time}

Parameters

Name	In	Required	Type
`time`	path	yes	string

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/stations/{stationId}/tafs

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

GET/stations/{stationId}/tafs/{date}/{time}

Responses

Status	Description	Schema
`200`	success	—
`default`	—	—

thumbnails1

GET/thumbnails/satellite/{area}

Parameters

Name	In	Required	Type
`area`	path	yes	string

Responses

Status	Description	Schema
`200`	An image file	`BinaryFile`
`default`	—	—

zones6

GET/zones

Parameters

Name	In	Required	Type
`id`	query	no	array
`area`	query	no	array
`region`	query	no	array
`type`	query	no	array
`point`	query	no	—
`include_geometry`	query	no	boolean
`limit`	query	no	integer
`effective`	query	no	string

Responses

Status	Description	Schema
`200`	success	`ZoneCollectionGeoJson`
`default`	—	—

GET/zones/forecast/{zoneId}/observations

Parameters

Name	In	Required	Type
`start`	query	no	string
`end`	query	no	string
`limit`	query	no	integer

Responses

Status	Description	Schema
`200`	success	`ObservationCollectionGeoJson`
`default`	—	—

GET/zones/forecast/{zoneId}/stations

Responses

Status	Description	Schema
`200`	—	—
`default`	—	—

GET/zones/{type}

Parameters

Name	In	Required	Type
`type`	path	yes	—
`id`	query	no	array
`area`	query	no	array
`region`	query	no	array
`type`	query	no	array
`point`	query	no	—
`include_geometry`	query	no	boolean
`limit`	query	no	integer
`effective`	query	no	string

Responses

Status	Description	Schema
`200`	success	`ZoneCollectionGeoJson`
`default`	—	—

GET/zones/{type}/{zoneId}

Parameters

Name	In	Required	Type
`type`	path	yes	—
`effective`	query	no	string

Responses

Status	Description	Schema
`200`	success	`ZoneGeoJson`
`default`	—	—

GET/zones/{type}/{zoneId}/forecast

Parameters

Name	In	Required	Type
`type`	path	yes	string

Responses

Status	Description	Schema
`200`	success	`ZoneForecastGeoJson`
`default`	—	—

Try it

Operation

API key

Developer reference

Base URLhttps://api.weather.gov

Rate limit

No fixed public rate limit is published; exceeding an undisclosed threshold returns an error, typically clearing within ~5 seconds. Every request must include a descriptive User-Agent header identifying the app (e.g. contact info) — direct client requests are rarely throttled, but requests routed through shared proxies are far more likely to hit the limit.

Key endpoints

GET/points/{latitude},{longitude}
GET/gridpoints/{wfo}/{x},{y}/forecast
GET/gridpoints/{wfo}/{x},{y}/forecast/hourly
GET/alerts/active
GET/stations/{stationId}/observations/latest

GreatAPIs Score

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Auth quickstart

Endpoints

Try it

Developer reference

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