Bar Harbor in September
Great time to visit
September delivers some of the year's best weather with noticeably smaller crowds after Labor Day. You'll get nearly ideal conditions for exploring Acadia and downtown at more reasonable prices.
Weather
September brings delightful weather with warm days, cool nights, and lower humidity than summer months. You'll see the first hints of fall color by month's end. Rain increases slightly but stays manageable.
21°C high10°C low7 rain days
Crowds & Cost
high crowds
~$210/day average
Events & Festivals
- •Acadia Centennial celebration events
- •Maine Lobster Festival in nearby Rockland
September Tips
- •Labor Day weekend stays busy, but crowds drop significantly after the holiday
- •Perfect weather for all outdoor activities without summer's heat
- •Restaurant reservations become easier to secure than in July and August
All Months
June through October offers the best weather, but each month brings trade-offs. July and August mean warm days perfect for hiking and swimming, but also crowds, higher prices, and traffic jams on Route 3. September is the sweet spot — comfortable temperatures, fewer crowds, and early fall colors starting to show. October brings spectacular foliage but chilly mornings and some businesses closing for the season. June offers wildflowers and reasonable crowds, though ocean water stays frigid. Many restaurants and attractions close from November through April, and while winter has its own stark beauty, Bar Harbor essentially hibernates. The Island Explorer buses only run late June through Columbus Day, which limits your car-free options outside that window.
Bar Harbor Scores
Solo
7/10
Couples
8/10
Families
9/10
Adventure
7/10
Budget
5/10
Luxury
6/10
BUILD YOUR BAR HARBOR PLAN
Insider picks, smart timing, and a plan ready when you are.