Why Mare is worth the booking
Mare seats about 12 diners at three tables on the Plaza de la Candelaria, with a central bar where dishes are finished in front of you. It earned its first Michelin star in the 2026 guide and a first Guía Repsol Sol the same year, which makes it the smallest and newest serious room in the old town. This is a tasting-menu restaurant, not a place to drop in for a plate of fried fish: if that is what you want, start with pescaíto frito elsewhere and come here for an evening that has been planned.
The cook and the room
Chef Juan Viu was born in Barbate, trained at the Escuela Superior de Hostelería de Sevilla and cooked in demanding kitchens before opening here. The restaurant describes its cooking as a homage to Cádiz's seafaring tradition in a precise, contemporary language, and the Guía Repsol puts it more simply: he lifts the stews of his mother and grandmother to fine dining, in a menu that follows the fish auction.
The dining room is white and blue, minimalist and quiet, meant to recall the light on the Cádiz coast. With only three tables there is no background crowd: you hear the kitchen and your own table.
Same square, earlier history
Mare occupies the premises where Código de Barra, the city's other Michelin-starred restaurant, began before it moved to calle San Francisco. If you are building a food-led weekend in Cádiz, the two make a useful contrast: one grew out of this small room, the other is the bigger operation.
Booking and house rules
Reservations are taken only through the restaurant's website; groups of more than four are asked to phone. A credit card is requested to hold the table, and the booking counts only once the confirmation email arrives. Children under 14 are not admitted. Check the booking page for current service days, as the restaurant publishes its phone-line hours rather than a plain opening schedule.