Though beaches are few and far between in Portland, shorelines abound in the nearby Casco Bay Islands. The Casco Bay Islands are a group of islands located off the coast of Portland, six of which are accessible by ferry year-round. Each island has its own personality, history, attractions and activities.

Cliff Island, one of the smallest Casco Bay Islands, is home to only 60 residents year-round and is the only year-round island that features unpaved roads and as such, cars are seldom used. Meanwhile, Great Diamond, which was home to historic Fort McKinley, is lauded for its quintessential Maine landscape and boasts shallow, rocky shorelines backed by lush forests. Cars aren't allowed, so walking, biking or getting around on golf carts are the modes of transportation. You'll find plenty of beaches on this isle, specifically the stunning Diamond Cove, as well as a small museum, a bowling alley and tennis courts. You can make a weekend of it and stay at the Inn at Diamond Cove, which has a host of activities and excellent dining options.