Wentworth By the Sea commands the island of New Castle, NH's oldest settlement. Our Portsmouth, NH hotel is located just an hour north of Boston with easy access to I-95, Manchester NH and the Boston airports. Overlooking the Atlantic Ocean, our hotel is the perfect destination for a romantic getaway or family vacation. This New Hampshire resort offers intimate restaurants with imaginative cuisine, spa services, indoor and outdoor pools, nearby beaches, fitness and business centers, and wireless internet.