WeatherFlow Forecast and Sensor integration for Home Assistant

Home Assistant integration for WeatherFlow Cloud Based Data using the REST API

Important

I am amazed by this community. A member just donated me a brand new Tempest station, and I can now continue supporting this Integration. THANK YOU VERY MUCH!

This integration adds support for retrieving the Forecast, Current condition and optionally realtime data from WeatherFlow. It replaces WeatherFlow Weather for Home Assistant that will soon be deprecated.

For this integration you must own a WeatherFlow weather station and you must create a personal API Token that work with your weather station. See this link for a description on how to retrieve the API Token. Note: There are two types of authorization oAuth and Personal API Token. Make sure you use the later.

Note: All development is done using a TEMPEST device, so no testing of the code is done using the old AIR and SKY devices. It does not mean that it will not work with that setup, but some sensors will not be available and no testing is done. Please do not add ask me to implement special features for these device, as it will not happen. This is open source, so you are welcome to create your own fork and implement as desired.

This integration will set up the following platforms.

Platform	Description
weather	A Home Assistant weather entity, with current data, daily- and hourly forecast data.
sensor	A Home Assistant sensor entity, with all available sensor from the API, plus a few local calculated.
binary_sensor	A Home Assistant binary_sensor entity, with few local calculated binary sensors.

Minimum required version of Home Assistant is 2023.9.0 as this integration uses the new Weather entity forecast types and it does not create Forecast Attributes.

Removal of the Public Developer Key

Since the release of the WeatherFlow API, there has been a generic Developer Key that would work to retrieve data from all Public Stations. As of March, 27th 2025, this key will no longer work. Please see this post by WeatherFlow. So if you don't own a WeatherFlow station, you will no longer be able to get an API Key, and this Integration will not work for you.

Installation through HACS (Recommended Method)

This Integration is part of the default HACS store. Search for WeatherFlow Forecast under Integrations and install from there. You can also download using this My link:

After the installation of the files, you must restart Home Assistant, or else you will not be able to add WeatherFlow Forecast from the Integration Page.

Once restarted, you can go to "Configuration" -> "Integrations" click "+" and search for "WeatherFlow Forecast" or use this My link:

If you are not familiar with HACS, or haven't installed it, I would recommend to look through the HACS documentation, before continuing. Even though you can install the Integration manually, I would recommend using HACS, as you would always be reminded when a new release is published.

Manual Installation

1. Using the tool of choice open the directory (folder) for your HA configuration (where you find configuration.yaml).
2. If you do not have a custom_components directory (folder) there, you need to create it.
3. In the custom_components directory (folder) create a new folder called weatherflow_forecast.
4. Download all the files from the custom_components/weatherflow_forecast/ directory (folder) in this repository.
5. Place the files you downloaded in the new directory (folder) you created.
6. Restart Home Assistant
7. In the HA UI go to "Configuration" -> "Integrations" click "+" and search for "WeatherFlow Forecast" or use this My link:

Configuration

To add WeatherFlow Forecast to your installation, do the following:

• Go to Configuration and Integrations

• Click the + ADD INTEGRATION button in the lower right corner.

• Search for WeatherFlow Forecast* and click the integration.

• When loaded, there will be a configuration box, where you must enter:

  Parameter	Required	Default Value	Description
  Station ID	Yes	None	Each WeatherFlow Station you setup, will get a unique Station ID, this id is needed during configuration. To get your Station ID, login with your account, select the station on the list, and then click Status. Here you will find your Station ID.
  API Token	Yes	None	The WeatherFlow REST API requires a Token. Please login with your account and create the token. Go to Settings and choose Data Authorizations (almost at the bottom). Create a personal access token and use that as Token (API key).
  Forecast Hours	No	48	Adjust the number of hours you want returned for the hourly forecast. Min is 12, max is 96 hours.
  Add Sensors	No	False	Mark the box if you want to have all the available sensors from the Rest API add to Home Assistant

• Click on SUBMIT to save your data. If all goes well you should now have a new Weather entity with data from WeatherFlow Forecast

• Please Note: The Token you create here will ONLY work with Stations that are registered under the same Login.

You can configure more than 1 instance of the Integration by using a different Station ID.

Reconfiguring an existing entry

If your API Token changes, or you replace your weather station and get a new Station ID, you don't have to remove and re-add the integration. Instead, use the Reconfigure option to update the existing entry, keeping all its entities, history and customizations intact:

• Go to Configuration and Integrations
• Find your WeatherFlow Forecast entry and click the three-dot menu on it.
• Select Reconfigure.
• Enter the new Station ID and/or API Token and click SUBMIT.

Your entities and devices are automatically migrated to the new Station ID, so they keep the same entity IDs, names, history and customizations instead of appearing as new hardware.

Available Sensors

Here is the list of sensors that the program generates. Calculated means, if No, then data comes directly from the Weather Station, if yes, it is a sensor that is derived from some of the other sensors. Not all sensors show up on all installations. It depends on where in the world your station is located.

Binary Sensors

All entities are prefixed with [STATION NAME]_binary_sensors_

Sensor Name	Description	Calculated
Data Available	Will be Off if no sensor data is returned from WeatherFlow. This typically happens if the station has not transmitted data for a while and you should check the status of the Station or the attached device.	Yes
Is Freezing	On when the Celcius temperature is below 0	Yes
Is Lightning	On when Lightning strikes are detected	Yes
Is Raining	On when the rain rate is above 0mm	Yes

Sensors

All entities are prefixed with [STATION NAME]_sensors_

Sensor Name	Description	Calculated
Absolute Humidity	The amount of water per volume of air	Yes
Air Density	The Air density	No
Apparent Temperature	The apparent temperature, a mix of Heat Index and Wind Chill	No
Barometric Pressure	The Barometric pressure	No
Battery	The % of charge on the Battery (Tempest device only)	Yes
Beaufort	Beaufort scale is an empirical measure that relates wind speed to observed conditions at sea or on land	Yes
Beaufort Description	A descriptive text of the Beaufort value	Yes
Cloud Base	The cloud height altitude above sea level	Yes
Data Updated	The time of the last data update. Disabled by default.	No
Delta T	Difference between Air Temperature and Wet Bulb Temperature	No
Dew Point	Dewpoint in degrees	No
Distance last lightning strike	Distance of the last strike	No
Freezing Altitude	The altitude above sea level where snow is possible	Yes
Heat Index	How warm does it feel?	No
Humidity	Relative Humidity in %	No
Illuminance	How much the incident light illuminates the surface	No
Lightning Strikes	Number of lightning strikes in the last minute	No
Lightning Strikes last hour	Number of lightning strikes during the last hour	No
Lightning Strikes last 3 hours	Number of lightning strikes the last 3 hours	No
Power Save Mode	Power Save Mode of a Tempest device	Yes
Precipitation Description	Type of precipitation. Possible values are: Dry, Rain, Heavy rain/Hail. State values are: (no_rain,rain,heavy_rain,) The values can be translated in to local language.	No
Precipitation duration today	Total rain minutes for the current day. (Reset at midnight)	No
Precipitation duration today Checked	Total rain minutes for the current day. (Reset at midnight). Only if Rain Check enabled and in the US	No
Precipitation duration yesterday	Total rain minutes yesterday	No
Precipitation duration yesterday Checked	Total rain minutes yesterday. Only if Rain Check enabled and in the US	No
Precipitation Intensity	A textual representation on the current rain rate	Yes
Precipitation last hour	Total rain accumulation for the last hour	No
Precipitation Rate	How much is it raining right now	Yes
Precipitation today	Total rain for the current day. (Reset at midnight)	No
Precipitation today Checked	Total rain for the current day. (Reset at midnight) Only if Rain Check enabled and in the US	No
Precipitation Type	Type of precipitation. Possible values are: 0 = none, 1 = rain, 2 = heavy rain/hail	No
Precipitation yesterday	Total rain for yesterday (Reset at midnight)	No
Precipitation yesterday Checked	Total rain for yesterday (Reset at midnight) Only if Rain Check enabled and in the US	No
Pressure Trend	Returns Steady, Falling or Rising determined by the rate of change over the past 3 hours	No
Sea Level Pressure	Preasure measurement at Sea Level	No
Solar Radiation	Electromagnetic radiation emitted by the sun	No
Staton Name	Station Name as state and more information about the station in the Attributes	Yes
Station Pressure	Pressure measurement where the station is located	No
Temperature	Outside Temperature	No
Time of last lightning strike	When the last lightning strike occurred	No
UV Description	A descriptive text of the UV Index	Yes
UV Index	The UV index	No
Voltage	The Voltage of the Tempest device	No
Visibility	Distance to the horizon	Yes
Wet Bulb Globe Temperature	(WBGT) is a specialised heat stress index which considers several environmental and personal factors.	No
Wet Bulb Temperature	Temperature of a parcel of air cooled to saturation (100% relative humidity)	No
Wind Cardinal	Current measured Wind bearing as text	Yes
Wind Chill	How cold does it feel?	No
Wind Direction	Current measured Wind bearing in degrees	No
Wind Gust	Highest wind speed for the last minute	No
Wind Lull	Lowest wind for the last minute	No
Wind Speed	Average wind speed for the last minute	No

Enable Debug Logging

If logs are needed for debugging or reporting an issue, use the following configuration.yaml:

logger:
  default: error
  logs:
    pyweatherflow-forecast: debug
    custom_components.weatherflow_forecast: debug

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