Portsmouth is a standout day trip from Boston for travelers who want a historic, walkable town with great food and a salty coastal setting. Despite its small size, Portsmouth feels lively thanks to its waterfront, brick buildings, and a strong restaurant scene. Start in the compact downtown, where you can browse independent shops and cafés, then visit Strawbery Banke Museum, an outdoor history museum that brings centuries of local life to life through preserved houses and costumed interpretation. A stroll along the Piscataqua River waterfront adds views of working docks and passing boats.

If you want more nature, the New Hampshire seacoast is close by. Odiorne Point State Park offers easy coastal trails and rocky shoreline, and nearby beaches provide a classic summer option. This trip is especially appealing to couples and friends who like to combine sightseeing with long lunches, craft beer, or seafood, but it also works well for families because the museum and parks are engaging without being exhausting.
Getting there from Boston is simplest by car, usually about 1 hour to 1 hour 30 minutes depending on traffic. Public transit is possible but less direct, typically involving buses from Boston to Portsmouth. Once you arrive, you can do most of the day on foot, and short rideshares can connect you to parks or beaches. For a smooth itinerary, arrive late morning, explore downtown and Strawbery Banke, then spend the afternoon on the waterfront or at a nearby park before returning to Boston after dinner. If you visit in fall, the foliage and crisp air make the town feel especially atmospheric.