According to the Portuguese Institute of the Sea and Atmosphere (IPMA), Tuesday will bring "very cloudy skies with periods of rain in the north and centre" of the country. Cloud cover may gradually decrease inland from mid-afternoon onwards.
There will also be "periods of light rain or drizzle, except inland south of the Serra da Estrela," which will be "more frequent until late afternoon and in Minho, where it will be moderate at times."
Still in the southern interior of the Serra da Estrela, the sky may be "partly cloudy."
Regarding the wind, it should blow "light to moderate from the west," although it may sometimes be "strong in the highlands until mid-morning." There will also be a "slight rise in maximum temperatures."
In turn, the sky will be "partly cloudy in the south," while the wind will be "light to moderate from the north/northwest, with southwest winds on the southern coast of the Algarve during the afternoon." In the mountains, it may blow "sometimes strongly" until late morning.
In the Greater Lisbon area, the sky will be "partly cloudy or clear." However, it may become "very cloudy between mid-morning and mid-afternoon," and there will be a "slight rise in maximum temperatures."
In Greater Porto, the opposite will happen, as the sky will be "very cloudy, with breaks in the afternoon." There may be "periods of light rain or drizzle, temporarily moderate, more frequent until mid-afternoon."
September temperatures?
The Portuguese Institute of the Sea and Atmosphere (IPMA) published its weather forecast for the first week of September on Friday, providing a 'hint' of what may follow in the following weeks.
According to the analysis, between September 1st and 7th, "air temperatures are expected to remain below normal values for this time of year."
According to the IPMA, by Tuesday, maximum temperatures will reach values between "20°C and 30°C throughout the country, and between Wednesday and Friday, they may reach values between 30°C and 33°C in the South region and in the Douro and Tagus valleys."