According to the information available on the IPMA website, you can expect "slightly cloudy or clear skies, but with cloudiness or morning fog", which will be more persistent until mid-morning and "may persist in some places throughout the day".
In the coastal area and in the highlands, the wind may increase in intensity from the afternoon onwards.
According to meteorologist Jorge Ponte from IPMA, a "sharp nighttime cooling" is also predicted.
Maximum temperatures should not exceed 21 degrees in Lisbon, Porto and Faro. Bragança should be at a maximum of 18 degrees and Guarda at 16ºC.
As for the islands, in Funchal, Madeira, the forecast is for a maximum of 23ºC and a minimum of 18ºC. In the Azores, the forecast for Ponta Delgada is a maximum of 18ºC and a minimum of 14ºC.