São Martinho do Porto is a bay located at the Silver Coast in Portugal. In a bit more than one hour (by car) from Lisbon and few minutes away from Nazaré or from Alcobaça, where you can visit the monastery.
In Summer time, blue and white tents invade the sandy beach. Walking along the bay, heading South, you will easily reach Salir do Porto, a former salination village; with low tide, you can cross the river and go up the Salir dune, so that you can then slide or run down…or in another way.
Heading to the North side of the bay, you will reach the port. There are many small anchored boats and it is possible to go sailing or canoeing.