When to surf · Lisbon and Cascais
Cascais in August
Still peak season and still small, but the first autumn pulses sometimes arrive late in the month. Water is at its warmest. The Sintra bodyboard world-tour event runs at Praia Grande in early September, on the shoulder of the month.

Cascais
For the Cascais town beaches, only a big winter swell wakes them up. Guincho surfs best autumn to spring; through summer it belongs to the wind and kite crowd on the afternoon nortada. Beginners are better off taking the train out to Carcavelos or Caparica in any season.
Summer