Port Jefferson Village is a pretty fun place to hang out, even if you are a dog.
Leash up your pet and take a stroll down by Harborfront Park where pets and their owners stroll along the walking paths. Dune dogs can hop down to the beach and dig and swim to their heart's content. The beach is easily accessible through the paved walking paths that lead to stone steps that take you to the beach.
If all that digging and fetching has your dog begging for a treat, take them down the road to Fetch, the doggy bakery. There you will find all sorts of special snacks and pet accessories.
Need a snack yourself? Tiger Lily across the street is always a good option.