The Algarve has been every foreigner's favourite slice of Portugal for decades now and surfers are no exception. It might lack some of the wave quality of Peniche and Ericeira but the laid back country vibe more than makes up for that, attracting ever increasing numbers of foreign surfers escaping from the icy winters of northern Europe. Being on the corner of the Iberian Peninsula means the Algarve has the widest swell window in the country and regular offshores on the south coast. SE wind swells can get these usually flat beaches pumping, while big winter nor'westers will wrap into the coves beyond Sagres.
The Algarve is a year round destination but autumn through to spring is really the peak period because the summer can be stinking hot and with long flat spells. Winter can still be warm enough for t-shirts and the water is the warmest in Portugal.