The Sintra Cascais area has various music festivals all summer long. Currently the Cool Jazz Festival is happening in Cascais. www.cooljazzfest.com Most of the concerts are at outdoor venues. Cascais is a wonderful city with great restaurants, bars, and wonderful beaches.
Consider staying at Colina Flora, a comfortable, “green” guesthouse www.colinaflora.com located in the beautiful hills of the Sintra Natural Park and only a 15 minute drive to Cascais. Bay of Cascais