Wentworth by the Sea, a Marriott Hotel & Spa, commands the island of New Castle, one of New Hampshire's oldest settlements. Masterfully blending classic style with 21st century convenience, our New Castle, NH hotel provides a memorable backdrop for business conferences, weddings, family vacations, and romantic getaways. Our elegant rooms, suites and villas, many with ocean views, showcase luxury perks. At our luxury hotel in New Hampshire, we offer pampering spa services, indoor and outdoor pools, fitness and business centers, on-site marina, and intimate restaurants with imaginative cuisine. If you're hosting a business event in the Portsmouth area, we offer 10,000 square-feet of flexible event space near Portsmouth, NH and expert planning services. There’s no shortage of wonderful things to do from our hotel near Rye, NH from exploring the best hiking near Portsmouth, NH to exploring historic downtown Portsmouth. A grand resort experience is yours to enjoy at Wentworth by the Sea, A Marriott Hotel & Spa.