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 luxury 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. As one of the top luxury hotels in New Hampshire, we offer pampering spa services, indoor and outdoor pools, fitness and business centers, wireless Internet, and intimate restaurants with imaginative cuisine. If you're hosting a business event in the Portsmouth area, our hotel offers 10,000 square-feet of flexible space and expert planning services. There’s no shortage of wonderful things to do on your next New Hampshire getaway, from visiting Water Country to exploring historic downtown Portsmouth. A grand resort experience is yours to enjoy at Wentworth by the Sea, A Marriott Hotel & Spa.