Guincho Beach, Surf and kitesurf spot in Alcabideche, Portugal.

Guincho Beach is an Atlantic beach on Portugal's Estoril coast, about 5 km from Cascais, with a shoreline of roughly 800 metres. It lies at the western edge of the Sintra-Cascais Natural Park, where rocky, brown and tan cliffs topped with sparse green vegetation rise behind the water. The beach is known for strong northern winds in summer and larger swells in winter, making it popular for surfing, windsurfing and kitesurfing.

Guincho appeared in the pre-title sequence of the 1969 James Bond film On Her Majesty's Secret Service, with Bond rescuing Contessa Teresa di Vicenzo from the surf. In the 1990s the beach hosted stages of the Professional Windsurfers Association World Cup tour. It now regularly holds the Portuguese National Surfing and Bodyboarding Championships.

Guincho appears in the pre-title sequence of the 1969 James Bond film On Her Majesty's Secret Service, where Bond rescues Contessa Teresa di Vicenzo from the surf. The beach later featured in the Portuguese TV series Morangos com Açúcar, and its beach bars draw night owls from Lisbon for chill-out and beach parties.

Bus 15 from Cascais serves the beach. Paid parking with 500 spaces sits at the north end, with a path straight to the sand and the beach bar; free parking at the south end means a two- to five-minute walk. Some paid lots become free in winter, and cars often line the main road in season.

The beach lies within the Sintra-Cascais Natural Park, and only a road separates it from the Cresmina dune, crossed by a wooden-boardwalk loop trail. The beach appears in the 1969 James Bond film On Her Majesty's Secret Service and later in the Portuguese series Morangos com Açúcar.