Somo is the easy escape across the bay from Santander, known for a long sandy beach and consistent surf. It gives the city a different coastal mood: open Atlantic beach rather than elegant urban waterfront, with enough space to walk, swim, or watch lessons in the whitewater.
The ferry crossing makes the outing feel like a small trip even before you reach the sand. Check surf and wind if you are going for lessons, and allow time for a beach walk toward Loredo if conditions are good. It is one of the best ways to turn Santander from a city break into a coast day.