IPMA vs weather-api

IPMA's open-data service is a plain directory of continuously-refreshed static JSON files, not just a single forecast endpoint: it covers daily/hourly weather forecasts, real-time station observations, sea-area and district warnings for mainland Portugal, the Azores and Madeira, plus separate seismic and biology (pollen) datasets from the same institute. No registration is required, though IPMA asks heavy users to email its webmaster for usage statistics.

This is an MIT-licensed Go application that returns current conditions, wind speed, and a three-day forecast as JSON for a city name. The author runs a free public demo at goweather.xyz/v2/weather/{city}. It needs no key and sends open CORS headers. The older /weather/{city} route on that host now returns 404, so use the /v2 path. The repo is not archived, and the last push was in October 2026. You can also build the app and host it yourself.