Harborside Hotel, Spa & Marina is an oceanfront resort in downtown Bar Harbor, Maine, set along the shores of Frenchman Bay. Part of the Opal Collection, the hotel offers a coastal retreat for vacations, weddings, meetings, and other gatherings, with easy access to the neighborhood and Mount Desert Island. Its accommodations include guest rooms and suites, many with island or bay views; select options feature balconies, full kitchens, hot tubs, or gas fireplaces. Guests seeking a longer stay can book The Willow House, a private four-bedroom home available for rentals of 31 days or more, with access to the hotel’s amenities.

On site, visitors can enjoy an oceanfront pool, marina, spa treatments at Opal Spa, and dining featuring coastal Maine cuisine. The hotel also helps guests make the most of the area through ocean experiences, whale-watching tours, and local activities. Seasonal holiday menus, brunches, buffets, and resort events add to the year-round appeal.