Located in the heart of the New Hampshire seacoast, on the majestic island of New Castle, NH, surrounded by the coastal waters of Portsmouth, the new Wentworth By the Sea Marriott Resort Hotel and Spa offers unparalleled meeting facilities that accommodate groups up to 300. Nine meeting rooms that include the original Grand Ballroom and stage, the Wentworth Ballroom, multiple conference rooms, and a boardroom total over 10,000 square feet, each with high-speed internet connection availability and audio visual equipment packages boasting the finest in communication and presentation technology, are sure to meet and exceed your company's meeting and banquet needs. Our two restaurants also provide exceptional views and dining options from casual to elegant dining.