According to the Portuguese Institute of the Sea and the Atmosphere (IPMA), this notice covers the districts of Viana do Castelo, Braga, Porto, Aveiro, Coimbra, Leiria, Lisbon, Setúbal, Beja and Faro and is valid between 00:00 and 18:00 on Saturday.

According to the IPMA, northwest waves of 5 to 6 metre in height are expected, reaching a maximum height of 10 to 11 metres.

Earlier, on Friday, the districts of Viana do Castelo, Braga, Porto, Aveiro, Coimbra, Leiria and Lisbon will be under a yellow warning from 15:00 also due to the forecast of maritime agitation with waves from the northwest with 4 to 5 metres.