I’ve been riding on the Algarve in winter a few times, we hired bikes & gps from our hotel reception for a couple of days self guided (bike were delivered to the hotel – think they were called NumberOneBikes) it was good, took us 20+ miles off the beaten track – I’d not like to do it in summer.
On another trip we rode from a bike shop in Albufeira guided with a group of mixed ability & it was fairly tame 12 miles but the owner said they do harder rides & uplifted stuff if they get at least 6 riders (think they were called tracks & tours)
It was low 20’s in December during the day with zero rain.
That Wheelers website is terrible & its not obvious which country you’d be riding in let alone which airport they transfer from.
Holiday Empire 6 nights Sunday – Saturday seems odd as well.