This is a snapshot from the beach webcam at Praia da Luz today 27th September 2020 at 2pm.
The climate on the Algarve at this time of year is wonderful and there are frequent hot sunny days and infrequent cooler ones.
According to www.timeanddate.com here is a graph of average climate statistics.
The link to this page is https://www.timeanddate.com/weather/@2271989/climate
Take advantage of lower prices, quieter bars and restaurants and the great weather and get out to Praia da Luz this autumn.