10 Best Gyms in Portsmouth, NH (August 2026)

By verified reviews, highly rated fitness options serving Portsmouth include Grizzly Weightlifting, Form, On Target Fitness, and F45 Training Portsmouth. The best fit depends on whether you want strength training, functional classes, or personal coaching.

Think about what you'll actually use — weights, cardio, classes, or coaching — then compare local options on verified reviews and visit for a trial. Portsmouth has options from strength-focused Grizzly Weightlifting to class-based F45 Training, so match the atmosphere to your goals.

Yes — Portsmouth has dedicated options including Grizzly Weightlifting for strength and F45 Training for functional group classes, alongside personal-training studios. Ask each about intro sessions and beginner programs.

Portsmouth is on the Seacoast in Rockingham County and uses the 603 area code (with 207 common across the Maine line). Portsmouth gyms draw members from across the Seacoast on both sides of the river.