@Bin manYes. It a small town but has lots of interesting old buildings to wander around and see. If the market is on then lots to mooch around there too, not just food.
For me the highlight was trying some really authentic local cuisine. Follow the locals at lunch time and you can’t go wrong. We ended up in a place called La Pia which had a very small menu but did an absolutely brilliant version of Farinata. It’s just a small cafe in a back street but well known for this particular food.
We also stopped off for cheese and wine in a pavement cafe. It served all local cheeses and wines. Lots of places to choose from, enjoy a glass and people watch.
If you just want a quiet day, strolling, admiring the scenery and trying good food / wine then yes a great day locally.
When we were there last you were not allowed to walk through the port but it was a two minute shuttle drop off and right into the main promenade area. They were doing work so you may just be able to walk in now, it’s not far at all.