Any day is a good day at the beach. Most of this information was gathered from Portsmouthnh.com
The breathtaking Atlantic Coast. Wide swaths of soft sand to sink your feet in. A boardwalk with family amusements. Nighttime entertainment by the shore. An RV park for your visitors and wondering friends. It's no wonder that New Hampshire beaches are some of the most popular in all of New England.
* Hampton Beach is New Hampshire's most famous seaside locale. The waves are just right for boogie boarding, the boardwalk is lively day and night, and restaurants cater to seafood-craving summer crowds. Kids love nightly outdoor concerts, weekly fireworks, movies on the beach, and arcades.,
* Jenness State Beach is a great family location with an Atlantic ocean-front setting - its sandy beach is ideal for swimming and picnicking. Amenities at the beach include a bathhouse. Metered parking is available for 67 cars.
* New Castle Beach: Small, picturesque Sandy Beach, 10 minutes from Portsmouth, has the U.S. Coast Guard Station at one end and a large seaside park, New Castle Common, at the other end.
* North Hampton Beach: North Hampton State Beach on Route 1A is located the heart of the short New Hampshire Seacoast.
* Seabrook Beach: Just down the road from Hampton Beach, near the Massachusetts border, Seabrook Beach offers a quieter setting and an expanse of sand dunes.
* Wallis Sands State Beach, about 15 minutes south of Portsmouth, is a beautiful, sandy curving beach. that can best be seen looking south on Route 1A. It has a large parking lot, showers and restrooms, and the state charges admission in summer.
Plum Island: Plum Island is a barrier island located off the northeast coast of Massachusetts, north of Cape Ann, in the United States. It is approximately 11 miles in length. The island is named for the wild beach plum shrubs that grow on its dunes. Spend the day at the beach or go for a bite and drink at the Plum Island Grille or Beachcoma.
Salisbury Beach: Salisbury is a small coastal beach town and summer tourist destination in Essex Country, Massachusetts United States. The community is a popular summer resort beach town situated on the Atlantic Ocean north of Boston on the New Hampshire border. It is home to the new Salisbury Beach Boardwalk, full of souvenir shops, restaurants, cafes, arcades and panoramic views of the Atlantic Ocean.