Summer daytime temperatures range from 45 to 90 degrees F. Evenings are cooler. Dressing in layers is advisable for any boating or hiking activities. Ocean water temperatures range from 50 to 60 degrees F. Lake water temperatures range from 55 to 70 degrees F.
Fall temperatures can range from low 70s during the day to freezing during the night. Come prepared for all types of weather, from sun to fog, from downpours to flurries. Fall foliage often peaks during the first few weeks in October; the peak time is generally mid-October. Weather conditions over the summer, such as drought, may alter the time that the leaves peak. Visit the park's leaf-peeping page or the state of Maine's fall foliage website for more information.
In the winter, due to Acadia's coastal location, snow and weather conditions change rapidly. Temperatures vary from mid-30s to below zero. The park averages 61 inches of snow annually. For the latest in weather information, call the local weather phone line at 207-667-8910 or call the park at 207-288-3338.