How Crowded Is Katmai National Park & Preserve in September?

September runs about 1.8× Katmai National Park & Preserve's average month, which makes it a very busy month here — roughly 15% of the park's yearly visitors come in September.

In a typical September the park sees roughly 7,900 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes September the 3rd-busiest of the park's twelve months, sitting between the July peak (5.1×) and the January low (0×).

On our Best Time to Visit score September rates 48/100 ("Fair"), versus the top-rated May at 69/100 — best overall balance of crowds, weather and daylight.

Typical September weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 54°F and an overnight low around 39°F, with about 5.1" of precipitation.

That average of about 47°F is cool, so layers and a shorter daylight window matter.

Because June, July and August together draw about 83% 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 12.5 hours of daylight in September to explore — between the 6-hour midwinter low and the 18-hour summer high.

Park-wide, 2023 drew 33,763 recreation visits, down 34.5% from 51,511 in 2020.

Across the past decade overall visitation has eased about 10.3%, so September may feel a touch quieter than it once did.