Acadia crowd calendar.

Acadia's crowd calendar, month by month.

Each bar is a calendar month's average recreation visits over the last five years (2021-2025), shown as a share of Acadia's own busiest month. The full numbers are in the table below, and every month links to its own detailed page.

Reading the shape of the year.

Acadia's calendar is a tall, narrow spike sitting on an almost-flat winter floor. August tops out at about 799,000 average visits, July close behind at 786,000, September at 663,000, and October at 557,000, so the busy season is essentially a five-month burst from June through October. Outside that, the park nearly empties: February bottoms out around 14,000 visits and January, March, November, and December all sit in the low single digits as a share of peak.

That roughly 58-to-1 gap between the loudest and quietest month is the steepest in this whole set, steeper even than Yellowstone or Glacier. The cause is a short coastal season plus the Park Loop Road's winter closure: once the road system winterizes in late fall, the crowd cannot really form, and the deep-winter months become a quiet, locals-and-snowshoers park. That closure shows up as the sharpest cliff on the calendar: the fall from October at about 70% of peak to November at roughly 9% is the steepest month-to-month drop Acadia records all year, the single point where the coastal season effectively ends.

Within the busy season, the shape has a distinctive autumn shoulder. Many parks fall off a cliff after Labor Day, but Acadia holds high through September (about 83% of peak) and October (about 70%) as fall foliage draws its own wave of visitors along the coast. That makes early fall the most interesting timing question here: the color peaks in the first half of October, the Park Loop Road is still fully open, and crowds have eased from the July-August wall without collapsing. April, at about 13% of peak, and May, at 41%, mark the spring ramp for anyone chasing quiet before the season fully arrives. For the weather, road, and best-window verdict that pairs with this crowd shape, including how carriage-road and summit access shifts through the season, see the best-time-to-visit page.

The shoulder window

The best in-season shoulder is late September into mid-October (about 70-83% of peak) when foliage peaks and the summer crush eases. Spring (April-May) is quieter still but with limited services. For the full "so when should I actually go?" verdict, which weighs crowds against weather and road access, see the Acadia best-time-to-visit page.

How to read this calendar

Every number here is a five-year monthly mean of Recreation Visits (2021-2025) from the official NPS Visitor Use Statistics Data Package, 2025. Each bar and table row is that calendar month averaged across the last five years, so one odd weather year or one road closure does not swing the shape. The "share of peak" column expresses each month against Acadia's own busiest month, which is the honest way to compare a quiet month with a loud one. One limit worth stating plainly: this is monthly data, so it tells you which months are busy, not which days or weekends. For within-the-month timing, a holiday week or a summer weekend still runs busier than a plain weekday, but our data cannot measure that. Independent site, not affiliated with the National Park Service.

Common questions.

What is the busiest month at Acadia?

August, at about 799,000 average recreation visits, with July close behind. Acadia packs almost its entire year into June through October, so summer runs intensely busy.

When is Acadia least busy?

February, averaging about 14,000 visits, only about 2% of the August peak. The Park Loop Road winterizes in late fall, so November through April is a near-empty, off-season park.

How do I avoid crowds at Acadia?

Target late September into mid-October. Fall color peaks, the Park Loop Road is still open, and crowds have eased to about 70-83% of the summer peak. Spring is quieter but with fewer services open. See the best-time page for the full verdict.

Is Acadia worth visiting in the off-season?

It can be, if you want solitude over full access. November through April runs at a small fraction of summer crowds, but the Park Loop Road and most services are closed, so it becomes a quiet park for walking, not driving.