Free & Cheap Things to Do in Portsmouth

Parks & Nature

Prescott Park is Portsmouth's crown jewel — a stunning waterfront park on the Piscataqua River with formal flower gardens that bloom from May through October, river views of historic tugboats and working vessels, and a packed summer calendar of completely free outdoor events. The Prescott Park Arts Festival runs all summer long with free outdoor theater, concerts, and film screenings on the waterfront lawn, making it one of the best free summer entertainment programs in New England.

Address: 105 Marcy St, Portsmouth, NH 03801

Tip: The Arts Festival runs July and August with free performances most evenings and weekends — check the schedule at prescottpark.org and bring a blanket or low chair. The flower gardens peak in July. The park connects directly to the Strawbery Banke Museum border for easy neighborhood walking.

History & Culture

The Portsmouth Harbor Trail is a free self-guided walking tour through one of the best-preserved colonial downtowns in America, connecting 70 historic sites with a simple map and numbered markers. The route winds through cobblestone streets, past 18th-century merchant mansions, through Market Square — the city's lively commercial heart — and down to the working harbor. It's the best free way to experience four centuries of American history while exploring one of New England's most walkable cities.

Address: Starting point: Market Square, Portsmouth, NH 03801

Tip: Download the free trail map from portsmouthhistory.org before you go. The full trail takes about 2 hours at a leisurely pace. Market Square has good free parking on Sundays. Combine with a stop at Prescott Park for a complete downtown day.

History & Culture

Docked permanently in a park near Portsmouth's waterfront, the USS Albacore is a 1953 research submarine that pioneered the teardrop hull design now used by nearly every submarine in the world. Self-guided tours take you through the actual submarine — from the cramped torpedo room and control room to the crew quarters — with audio narration explaining the revolutionary engineering that changed naval history. For military history enthusiasts, it's one of the most intimate and affordable submarine museum experiences in the country.

Address: 600 Market St, Portsmouth, NH 03801

Tip: Tours are self-guided so you can linger in the compartments that interest you most. Claustrophobic visitors should note that the submarine's interior passages are genuinely tight. Open daily May through November; limited hours December through April. The surrounding park grounds and picnic area are free to visit even without a submarine tour.

Parks & Nature

Peirce Island is a small island in the Piscataqua River connected to downtown Portsmouth by a short bridge, offering a free outdoor swimming pool, picnic areas, walking paths, and sweeping views of the river and the historic tugboat fleet. The city-operated outdoor pool is open in summer for a very low daily fee, while the island's walking paths and river overlooks are completely free year-round. It's a beloved local spot that most tourists walk right past — which means it's uncrowded even in peak season.

Address: Peirce Island Rd, Portsmouth, NH 03801

Tip: The outdoor pool is open late June through Labor Day — a $4 swim in the river-cooled pool on a hot summer day is one of the best deals in Portsmouth. The walking path around the island's perimeter takes about 20 minutes and offers great views back at the city skyline. Free parking on the island.