Cais 20 is a fish and seafood restaurant in São Roque, on the south coast of Ponta Delgada. It is known for long opening hours and a broad menu designed for both full meals and snacks outside conventional dining times. The restaurant advertises fresh fish, shellfish, limpets, octopus, meat and Azorean-inspired dishes, with individual items naturally subject to the day's availability.
The dining room is close to São Roque harbour and seafront, on 2.ª Rua do Terreiro. It opens from noon until 4 a.m. on Monday, Tuesday, Wednesday, Thursday, Saturday and Sunday, and closes on Friday. Because kitchen availability can vary across such a long service period, guests should confirm which dishes are being served and book ahead, particularly for groups and at weekends.