Join

Which station?

To take part in WOW-NL you need an automatic weather station. The platform does not require a specific brand or model, but check compatibility before buying anything. At least as important as the quality of your sensors is the placement of your station. Try to follow these guidelines:

• Temperature: Place the thermometer in an open spot, away from buildings, in a ventilated housing.
• Wind: Choose an open location without major obstacles. Note the height above ground and any nearby buildings or trees.
• Precipitation: Avoid obstacles in the prevailing wind direction.
• Humidity: Deviations of 5% or more are normal. In fog above freezing, the value should approach 95–100%.
• Air pressure: No specific placement requirements.

Migrating an existing WOW station

The existing connection between your station and WOW will be discontinued during 2026. Stations must be re-registered on the platform of the Belgian RMI. The upload protocol is identical to the former UK Met Office protocol, except for air pressure measurements (see note below).

Step 1: register your station on WOW-BE

Create an account at wow.meteo.be/web/login and register your station. After registration you will receive by email a new station ID (short and long version) and your self-chosen authentication key.

Step 2: update the endpoint

Change the upload endpoint from http://wow.metoffice.gov.uk/automaticreading? to http://wow.meteo.be/api/v2/send?

Most weather software already supports this in their most recent versions:

Step 3: update your station details

Replace your old station ID and PIN with the new station ID (short or long version) and your new authentication key.

Step 4: check the connection

Check your personal dashboard to see whether data is being sent. Your station will appear on the map a few minutes later.

“WOW-BE/NL ready” station

A “WOW-BE/NL ready” station has an interface (app or web) that allows a custom upload and supports one of the following protocols: WOW-UK, Weather Underground or Ecowitt.

Examples: Eurochron EFWS2900 (also sold as Garni 940, Alecto 5500, Ventus W830), Ecowitt stations with an internet connection.

Step 1: register your station

Create an account at wow.meteo.be/web/, log in and choose “Register a station”. You will receive the station ID and authentication key by email.

Step 2: configure your station

In the app, choose “Customized” as the server (not “WeatherObservationsWebsite”). Set the upload interval to 1 minute.

Wunderground protocol

• Server: wow.meteo.be
• Path: /api/v2/send?
• ID: short station ID from the registration email
• Key: your self-chosen authentication key
• Port: 80

Ecowitt protocol

• Server: wow.meteo.be
• Path: /api/v2/send?
• Port: 80

This protocol uses your station’s MAC address as identification — no ID or key required.

Stations without a configurable upload path

For stations such as the Bresser 8-in-1 (WSLink app): use the Wunderground protocol with server towowbe.dev.

DIY with the WOW-BE API

You can also build your own integration with the API to connect your station. Full documentation: wow.meteo.be/docs/api/#/operations/send

Important changes compared to the old WOW protocol

• The solarradiation parameter has been added.
• rainin is always interpreted as rainfall intensity in inches/hour.
• baromin = relative pressure; absbaromin = absolute pressure. baromin is the authoritative value.