How Crowded Is Eugene O'Neill National Historic Site in September?

September runs about 1.3× Eugene O'Neill National Historic Site's average month, which makes it a busy month here — roughly 11% of the park's yearly visitors come in September.

In a typical September the park sees roughly 1,300 recreation visits, based on National Park Service monthly counts from 1985 to 2025.

That makes September the 2nd-busiest of the park's twelve months, sitting between the May peak (1.3×) and the January low (0.7×).

On our Best Time to Visit score September rates 15/100 ("Poor"), versus the top-rated January at 79/100 — the best overall balance of crowds and daylight.

Because June, July and August together draw about 29% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 12.2 hours of daylight in September to explore — between the 9.4-hour midwinter low and the 14.6-hour summer high.

Park-wide, 2025 drew 14,881 recreation visits, down 15.7% from 17,653 in 2024.

Across the past decade overall visitation has risen about 208.6%, so a September visit is likely to feel busier than it did a few years ago.