This is the bayside of Fire Island, at the Sunken Forest.
September and October are the best months on Fire Island, in my opinion, because the summer crowds are gone and the weather still beautiful. It is quiet except for the sound of the ocean waves and birds, long gone are the many boats heading to the beach. An occassional plane or helicopter passes overhead. It is warm between the dunes and a long walk is the perfect way to spend the day!