In the usual brilliant manner, the town hall and event organisers have managed to keep this as hush-hush as possible, lest anyone should wish to attend, but our man-on-the-ground has infiltrated the inner sanctum and gleaned some much prized information for your delight. 

Plenty of posters for sausage festivals 25km away, and local processions that finished a month ago, but nowt about this that I have seen (bar some small signs that have appeared on roundabouts in the last 24 hours...)  .

http://marina.marinaalbufeira.com/en/events/classic-weekend-marina-de-albufeira-2018.html

Google translate has it roughly as follows:

 The Albufeira Marina will host the Classic Weekend Marina de Albufeira 2018.

To be held on the weekend of 14, 15 and 16 September 2018, the Classic Weekend Marina de Albufeira is made up of a small constellation of events with appeal to different audiences and will take advantage of the uniqueness of the Marina de Albufeira as a backdrop remarkable setting that fits a show of activities with enthusiastic amateurs.

The hinge event, which gives its name and motto over the weekend, is the Classic Weekend Marina de Albufeira itself, a regatta designed for classic sailing vessels that will provide unique moments for sailors, enthusiasts and the general public, who will flock to the water mirror and to the cliffs of the access channel to follow with fascination the evolution of the participating boats.

Simultaneously, in other spaces made stage of the Marina of Albufeira, will be the stop of the classic cars and motorcycles to which the exhibition will be followed for presentation to the public.

For the afternoon of Sunday is planned the live television broadcast of the water mirror already framed by the new space of articulation with the expansion for the second phase of the original project of the Marina of Albufeira.

Meanwhile, in other spaces of the Marina of Albufeira, the Classic Weekend Marina of Albufeira revolves with a classic concert and the wine and gastronomic event that highlights the increasingly recognized excellence of the terroir wine production and the art of the chefs that every day of the year adds experiences and pleasure to your customers' meals.

Finally, the exhibition will be open to meticulously cured art with the purpose of promoting the connection with the sea and the nautical recreation taking the visitors to explore the different spaces of the Marina of Albufeira.

An event with the support of the Albufeira Marina, Albufeira Town Hall,    

In fairness Portugal News did this piece in June. 

http://portugalresident.com/albufeira-marina-hosts-first-classic-weekend-in-september