aviso amarelo

Published 30 October 2026, 20:39

aviso amarelo — IPMA's yellow weather warning level

The lowest of the three levels IPMA uses for weather warnings: yellow, orange, red (when there is no threat, the level is green and there is no warning at all). Yellow means the weather may be dangerous for certain activities, such as outdoor work, sport or a long journey, but not for everyone. Warnings are issued by type of event: heat (tempo quente), cold, rain, wind, thunderstorms, snow, rough seas, fog. Each warning specifies the district it covers and its start and end times.

Where you come across it. On the IPMA website in the Avisos section, in the news and in weather reports; issued by district, not by town.

The level does not tell you how many degrees or millimetres to expect: it is about the risk, and you need to check the forecast separately for the figures. A yellow heat warning often comes with a high risk of wildfires, but these are different scales from different bodies: fire danger is shown on its own map. Madeira and the Azores are divided into their own warning areas with their own timings: a warning on the islands often lasts a day longer than on the mainland.

Official website: ipma.pt/pt/otempo/prev-sam

Guides

Heat and wildfires in Portugal: what to expect and what to do