The amount of time you should spend in Bar Harbor, Maine, depends on your interests and how much time you have available. If you have a few days, you can explore the town and its attractions, go on a whale-watching tour, or take a day trip to Acadia National Park. If you have a week or more, you can explore more of the area and its attractions, such as the Schoodic Peninsula, the Blue Hill Peninsula, and the many islands of the Maine coast.