Great Bay Spa & Sauna

Great Bay Spa & Sauna in Portsmouth, New Hampshire is a full-service spa and sauna destination serving New Hampshire’s most celebrated coastal city with comprehensive wellness amenities — including dedicated sauna access alongside massage therapy and body treatments — in a professionally managed, welcoming spa environment. Portsmouth’s thriving wellness culture, historic maritime character, and position as one of New England’s most acclaimed destination cities create strong demand for quality spa and sauna experiences, and Great Bay Spa delivers on that demand with professional, accessible wellness care. The combination of dedicated sauna access and full spa services makes Great Bay one of Portsmouth’s most versatile wellness destinations for both sauna-focused visitors and those seeking a complete spa experience.