How Crowded Is Theodore Roosevelt Island in September?
September runs about 1.2× Theodore Roosevelt Island's average month, which makes it a busy month here — roughly 10% of the park's yearly visitors come in September.
In a typical September the park sees about 17,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 2nd-busiest of the park's twelve months, sitting between the October peak (1.3×) and the February low (0.7×).
On our Best Time to Visit score September rates 24/100 ("Poor"), versus the top-rated February at 81/100 — the best overall balance of crowds and daylight.
Because June, July and August together draw about 26% 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 9.3-hour midwinter low and the 14.7-hour summer high.
Park-wide, 2025 drew 159,828 recreation visits, down 8.6% from 174,954 in 2024.
Frequently Asked Questions
September is busy at Theodore Roosevelt Island (about 1.2× the average month). Our best-time score rates it "Poor". The single best month overall is February.
The busiest month is October and the quietest is February. September sits at about 1.2× the park's average, or 10% of annual visitation.
A typical September sees about 17,000 recreation visits at Theodore Roosevelt Island, based on National Park Service monthly counts from 1979–2025.
Where to stay near Theodore Roosevelt Island in September
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Top-rated places to stay near Theodore Roosevelt Island
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1979–2025). Updated 2026-07-14.