The districts of Viana do Castelo, Braga, Porto, Aveiro, Coimbra, Leiria, Lisbon, Setúbal, Beja and Faro are under a yellow warning because of northwesterly waves with heights up to 4 to 5 metres.

According to the IPMA, the notice issued to these districts took effect at 12am on Monday and ends at 6pm on Wednesday.

The yellow warning is issued by the IPMA whenever there are risky situations for certain activities depending on the weather situation.

Because of the high waves, the Caminha, Vila Praia de Âncora, Esposende, Póvoa de Varzim, Vila do Conde and Ericeira bars are now closed to navigation.

According to information available on the website of the National Maritime Authority, the bars of Viana do Castelo, Aveiro, Figueira da Foz and São Martinho do Porto are now conditioned.

The IPMA foresees on the continent on Monday mostly cloudy skies, with little or no cloudiness in Baixo Alentejo and Algarve and the possibility of periods of light rain or drizzle to the north of the Montejunto-Estrela mountain system, especially in Minho and Douro Coast.

A light wind is also expected, blowing at times moderate from the west quadrant in the highlands of the North and Centre regions.

IPMA expects a minimum temperature rise in the North and Centre regions and a small decrease in the interior of the South region.

A small rise in maximum temperature is also expected, especially in the interior.

The minimum temperatures on the continent will vary between 6 degrees Celsius (in Guarda) and 14 (in Aveiro) and the maximum between 12 (in Guarda) and 22 (in Faro).