Observation

Overview

IPMA’s open-data API provides near-real-time hourly observations from the Portuguese automatic weather station network (~222 stations across mainland Portugal, the Azores and Madeira). No API key or registration is required — the feed is fully public.

Two JSON feeds are used: a station catalogue (stations.json, a bare array of GeoJSON Feature objects giving each station’s id, name and coordinates) and a single all-stations observation feed (observations.json) holding roughly the last day of hourly readings. Because the feed is a rolling window, only the recent period is available — there is no historical archive, so a date range within roughly the last 24 hours must be given.

The catalogue exposes no elevation, so height is always null, and — being a live feed — there is no operational start/end date per station. Wind direction is published as an 8-point code and is converted to degrees; pressure is reduced to mean sea level; radiation is global solar radiation in kJ/m². The value -99.0 marks missing data and becomes null. The intensidadeVentoKM field (the same wind speed in km/h) is not exposed, as it duplicates intensidadeVento (m/s).

License

Data is © IPMA (Instituto Português do Mar e da Atmosfera). See the IPMA API for further information and usage conditions.