Forecast

A Forecast tab with the next 24 hours and 7 days for your station location from Open-Meteo, plus the short-range outlook your own barometer implies.

Alongside your station's live readings, your site can show what is coming: a Forecast tab with the next 24 hours and the next 7 days for your station's location, and the outlook your own barometer implies.

What visitors see

Next 24 hours: hour-by-hour temperature with a weather icon and, when it is 10% or more, the chance of precipitation. The first entry is "now".
7-day forecast: today plus the next six days, each with an icon, the chance of precipitation, and a low-to-high temperature bar that shows each day's range.
The Overview tab's headline also uses the forecast's current condition for its icon ("Partly cloudy", "Light rain" and so on) next to your station's measured temperature.

Temperatures and rain amounts follow your site's unit system, and all labels follow your site's language.

Where the forecast comes from

Forecast data is provided by Open-Meteo, a free, open weather API, using your station's coordinates. A small "Forecast data by Open-Meteo" note appears under the forecast. The forecast refreshes roughly every 30 minutes.

By default Open-Meteo blends the best models for your location. Under Setup > Forecasting you can pick one model instead, such as ECMWF or ICON. The same page shows how each model has scored against your own station's readings over the last week, month or quarter, so the choice can rest on your numbers rather than on reputation. A change reaches your public site within five minutes.

Measured and predicted

Everything else on your site is what your station measured. The forecast is a model prediction for your coordinates, so it can differ from what your station ends up recording.

The station forecast

Above the Open-Meteo forecast sits a one-line outlook labelled "From this station's barometer": the reading a Zambretti forecaster gives for your current sea-level pressure, its three-hour trend, the wind direction and the season. It runs from "Settled fine" through "Changeable" to "Stormy, much rain", the same 26 phrases the 1915 dial printed, and it is the reading owners coming from CumulusMX expect to see on their own site.

It is not a substitute for the model forecast, which is a better prediction than a single barometer can make. It is there because it is your station's own opinion, because it keeps working when the upstream forecast does not, and because it needs only a barometer: a pushed station with no coordinates still gets a Forecast tab with this line on it.

Southern-hemisphere stations have the wind and season corrections flipped, and a three-hour change under 1 hPa is read as "steady" rather than as a trend, so the outlook does not flicker between refreshes on a calm day.

Turning it on or off

The forecast is on by default. Toggle it under Homepage → Visitor sections and tabs → Forecast (7-day & hourly) in your dashboard.

It needs your station's coordinates. If the toggle is greyed out or the tab never appears, your station has no location yet:

WeatherLink stations: set the location in WeatherLink, then open Connection and choose Reconnect & rediscover.
Vendor-cloud stations (Ecowitt Cloud, Tempest): coordinates come from the vendor account; set them there and reconnect.
Pushed hardware: enter latitude and longitude yourself on the Connection page, in the station card under the upload URL.

The same coordinates unlock the Astronomy and Sky events tabs and severe-weather warnings.

Next steps

Homepage: reorder tabs or change the default
Alerts & warnings: official severe-weather warnings for your area
Troubleshooting: if the tab does not appear