Guincho is the most famous beach around Lissabon. It impresses with big waves and regular strong winds.
There is a long road up the coast to get here and you can find a restaurant on the cliff.
Wind changes according to weather conditions. Can get strong
It is an open ocean beach, so waves can get big!
There is two hotels on the beach (not cheap) and plenty of options in close by Cascais (2 km), or if you prefere you can also stay in Lissabon and drive the 25km out to the beach
If you dont stay close to the beach, best is to drive out there, very close from Cascais
There is some restaurants at the beach