Figueira da Foz is a great city and need a page just for it.
Here i'm just thinking about water spots. Figueira da Foz have this great river, Mondego, great for water sports.
I usually go for a boat trip, or water motorbyke try.
5 Km From Coimbrão, there is Ervideira Lagoon, a small lagoon great for swimming. the water is good, not salt, and the lagoon is in the middle of pine trees wood, in summer weekend can be full but in winter or spring is as beautiful as a natural silence water spot can be.
3 km from Vieira de Leiria is Vieira Beach.
Is a beach smaller then Pedrogão but with their own live too.
There is where Liz River ends.
Vieira is an importante spot when you are visiting Coimbrão Zone, it is where the Supermarkets, the banks, medical care etc are.
Pedrogão beach is a large beach some km, quite near coimbrão too. (About 6 km).
It is a clean beach with the blue European flag.
The unique problem is the sea that is cold and dangerous.