Literally 3 minutes walk from Villa Lidia, along the Marina di Pisa promenade (“Lungomare”) with nice sea views. Good quality fresh seafood, with their “cacciucco” and grilled fish as staples. Service is sometimes not the fastest, however it worth the wait. Prices are a little bit above average, probably fair for the quality and seaside setting.
Highly recommended to book in advance.
Other suggestions
Gelateria De Coltelli (Pisa)
Sunset Cafe
I Porci Comodi (Pisa)
Ristorante L’Arsella