Welcome to the MET Norway Weather API v.3

Norsk versjon.

api.met.no/weatherapi is an interface to a selection of data produced by MET Norway. The data are available for use under a Creative Commons license. See also separate conditions for use of the service. Several people have developed third-party client libraries for various programming languages.

All regular users of the API are strongly recommended to subscribe to our API-users mailing list as this is the only channel on which we will communicate planned changes outside the API itself (see the archives for past notifications).

For operational status and maintenance notifications, see status.met.no (please bookmark in case there is a problem with the site).

For information on available data and how to access them, please refer to the weatherapi documentation. For a list of changes since version 2, see the Release Notes for v.3.

Data owned by other institutions than MET Norway is not available for unrestricted public use. This is specified in the documentation of each product. Examples of such products are the Nordic radar images and some satellite images. Refer to the documentation of each product.

Available products:

Alerts ⚠

Airqualityforecast 0.1
Forecast of air-quality for locations in Norway
Forestfireindex 1.1
Reporting danger level of forest fires.
MetAlerts 1.1
Weather alerts from the Norwegian Meteorological Institute

Astronomy 🌣

Sunrise 2.0
Calculate sun/moon rise/set for a given place

Aviation ✈

Aviationforecast 1.6
Textual aviation weather forecasts
NLAroutes 1.0
Vertical cross sections for air ambulance flight routes
Routeforecast 1.0
Maps and vertical cross sections for offshore flight routes
Sigcharts 1.0
Significant Weather Charts for aviation
Sigmets 2.0
Get sigmets and airmets for Norway
Spotwind 1.1
Spotwind forecasts for airport landing systems
Tafmetar 1.0
Receive Taf/Metar from airports
Turbulence 1.1
Turbulence prognosis
VerticalProfile 1.1
Vertical weather profiles for aviation
Volcanicashforecast 0.1
Norwegian national volcanic ash products including forecast

Lightning β˜‡

Frost 1.0
REST API for meteorogical observation data
Radar 2.0
Radar images from various locations

Marine βš“

Gribfiles 1.1
Serve grib files on the coast from Oslo and Western Norway
Icemap 1.0
Maps as images showing current ice conditions in the arctic regions.
Oceanforecast 0.9
Ocean forecast for a specified place
Oslofjord 0.1
Current maps for Oslofjorden and Drammensfjorden
Soundprofile 1.0
Vertical profiles in the ocean off the Norwegian coast
Textforecast 2.0
Textual weather forecast for Norwegian land and sea areas
Tidalwater 1.1
Tidal water information

Military βš”

Metgc 1.0
Deliver meteorological forecast data in METGM/C format for defined areas
Metgm 1.0
Deliver meteorological forecast data in METGM/C format for defined areas

Observations 🌑

Frost 1.0
REST API for meteorogical observation data

Other βš™

Weathericon 2.0
collection of weather icons.

Satellite πŸ›°

Geosatellite 1.4
Images from geostationary satellites
Polarsatellite 1.1
Images from satellites in polar orbit

Weather β›…

Frost 1.0
REST API for meteorogical observation data
Locationforecast 2.0
Weather forecast for a specified place
Nowcast 2.0
Immediate weather forecast for specified locations in the Nordic area
Probabilityforecast 1.1
Probability forecast for a specified place
Radar 2.0
Radar images from various locations
Subjectiveforecast 1.0
Forecasts and analyses charts from the meteorologist
Textforecast 2.0
Textual weather forecast for Norwegian land and sea areas

News

Termination of various products 2021-02-04

All good things must come to an end, hopefully to be replaced by something better. Here is an update of forthcoming changes to the weather APIs.

Locationforecast and Nowcast

As mentioned previously, the old versions of Locationforecast (1.9), Nowcast (0.9) and Weathericon (1.1) will terminate on March 1st, 2021. Incredibly, almost 70 % of the current API traffic is still using version 1.9, This means a lot of sites and apps will stop working shortly. We recommend everyone not yet upgraded to start working on this ASAP. Please see our docs for more information:

https://docs.api.met.no/doc/

Yr APIs

The Yr API (forecast,xml and varsel.xml), developed by the Norwegian Broadcasting Corporation NRK is also set to expire this summer, along with the old Yr site (retro.yr.no). All Yr API users should port their applications to use Locationforecast/2.0, noting the following differences:

  • Yr API uses XML, we recommend JSON for Locationforecast
  • Yr API uses placenames, for Locationforecast you must use lat/lon/altitude
  • Locationforecast requires identification in the User-Agent header

For more information on porting from Yr, see the developer site:

https://developer.yr.no/

Also, NRK is working on a one-time dump of their location database, which will give you the correct coordinates and altitude to use with Locationforecast and Nowcast, as well as the URL to the forecast on the new Yr site. This is expected to be ready in a few days. Please follow the mailing list or one of the sites above to get information on where to download it.

ExtremesWWC

As indicated, this product has long been deprecated, pending new functionality on Frost for the same purpose. Unfortunately this has not yet materialized, and now the production chain for ExtremesWWC is no longer supported. As a consequence we will turn it off tomorrow, February 5th 2021. Since this product only covers Norway and has only a handful of users, we hope you will forgive us the short notice.

Important changes to locationforecast and nowcast 2020-12-15

After several months in beta, Nowcast 2.0 is finally officially launched. Both this and Locationforecast have now got a definite date for termination of the old versions.

Continuation of XML format

Based on popular feedback we have decided to continue the XML format for Locationforecast and Nowcast into the foreseeable future. For this purpose we have added a /classic XML variant to Nowcast, which is basically identical to the version 0.9 format. This means porting from the old version should be much faster than rewriting to use JSON.

To support the XML format in the future, we will extend it to include the new symbol codes as introduced in Weathericon 2.0. Please use this instead of the numerical codes which are now deprecated. Starting today the symbol elements will look like this:

<symbol id="PartlyCloud" number="3" code="partlycloudy_day"/>

You can then link this to the partlycloudy_day.png icon which can be downloaded in Weathericon 2.0.

Some future additional changes to the XML format are to be expected. Some time within the next six months we will remove the following elements from the XML format; please don't use them in your clients:

<temperatureProbability unit="probabilitycode" value="0"/>
<windProbability unit="probabilitycode" value="0"/>
<symbolProbability unit="probabilitycode" value="1"/>

Termination of old versions

Now that both products have been finalized, we have decided it is time to say goodbye to the old versions, hailing from 2014 and 2016 respectively. On March 1st, 2021 the following products will no longer be available:

  • Locationforecast 1.9
  • Nowcast 0.9
  • Weathericon 1.1

Please update your systems to use the new version if you haven't already. If you keep running into 403 Forbidden errors, remember that according to the Terms of Service you must identify yourself with a unique User-Agent HTTP request header with contact information.

New version of Yr.no

As some of you may have noticed, yr.no now points to the new version (formerly the mobile site) and the old layout has been moved to retro.yr.no. The latter site is expected to be turned off in the summer of 2021; at the same time the old Yr API (varsel.xml/forecast.xml) will disappear. By this time users must have converted to use Locationforecast/2.0 for continued service.

The Yr developers at NRK are working on making a downloadable dump of the existings locations database, mapping place names to lat/lon coordinates. We'll be back with more information on this once we have something to report.

Minor changes to other products

Sigcharts has gotten a new parameter validdate which makes it possible to see which day a plot is valid for. This is now included in the available list.

Turbulence has had some airports removed and Vigra airport added. We have also enabled search by ICAO code instead of location name; this will become the default search method in the future (which means the links in available will use icao instead of location parameters). We recommend updating your clients to use this at your earliest convenience.

News archive

Change log

Locationforecast: XML updated with new symbol codes: 2020-12-14

Since Weathericon/1.1 is deprecated, we have added an attribute code to the symbol element, corresponding to the filename in Weathericon/2.0.

Nowcast: version 2.0 launched, 2020-12-13

2.0 out of beta, added classic.xml output. Version 0.9 will be removed 1 March 2021

Turbulence: Minor update, 2020-12-07
  • Vigra added. Fagernes, Narvik and Gimsøya removed
  • Now possible to search using ICAO code. In the future this parameter will be default, and location removed from the available string
Sigcharts: Version 1.0: 2020-11-30

Optional parameter validdate added

Nowcast: Changes to current version 0.9, 2020-11-09

We have replaced the old production backend for version 0.9 with the new one as used by beta version 2.0. This will incur some trivial changes, but is not expected to cause any compatibility problems for well-behaved clients:

  • The @xsi:noNamespaceSchemaLocation and Model@name attributes will be updated to reflect the new production
  • An @altitude attribute will be added to the location element (same as for Locationforecast)
  • The number of decimals in latitude/longitude is no longer fixed
Geosatellite: Usage restrictions lifted, 2020-10-01
  • After several revisions of the data policies we have finally confirmed that the satellite images can be freely distributed and available to all API users under the normal CC-BY 4.0 conditions.

Other data sources at MET Norway

See free meteorological data on met.no for a complete list of data services.

Questions?

For questions regarding rights to and use of data, see our Licensing and Data Policy. For handling of personal data, see MET Norway's Privacy Policy Statement. For technical questions, see our contact page.