Watch a volleyball match. Espinho is the Portuguese volleyball capital. Three local clubs host matches regularly: Associação Académica de Espinho, Clube de Voleibol de Espinho and Sporting Clube de Espinho.
Gamble in the Casino.
Play tennis at Complexo de Ténis de Espinho.
Walk on the city-long promenade by the beach.
Swim (be careful with the currents though) and enjoy the sun on the nice white sand beaches that Espinho offers.
Walk on the gangway that starts in the northern beach of Espinho and takes you through the dunes with a fine sea view up to several kilometers into Vila Nova de Gaia.
Rent a light aircraft and fly it at the Aero Clube da Costa Verde.
Visit the Planetarium and watch the stars from the Observatorium at Centro Multimeios de Espinho.
During the Summer there are plenty of bars by the beach. In other seasons, you might want to visit "Bombar" or "Doo Bop", the places by the beach where many locals gather for a beer and good music in the late evening/night.
The Tourism Office (Posto de Turismo, address: Rua 23 n.º 271, 4500-803 Espinho) is open every day from 9AM to 1PM and 2 PM to 5 PM. It can be be reached on the following phone numbers: +351 22 733 58 00 (1676) and + 351 227 335 872. You can also send them an e-mail at firstname.lastname@example.org