How Crowded Is Castle Clinton National Monument in August?

August runs about 1.5× Castle Clinton National Monument's average month, which makes it a busy month here — roughly 12% of the park's yearly visitors come in August.

In a typical August the park sees about 492,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes August the 2nd-busiest of the park's twelve months, sitting between the July peak (1.6×) and the January low (0.5×).

On our Best Time to Visit score August rates 44/100 ("Poor"), versus the top-rated September at 67/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical August weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 83°F and an overnight low around 69°F, with about 4.6" of precipitation.

That average of about 76°F is warm enough that midday heat is worth planning around.

August falls inside the park's busiest stretch: June, July and August together pull about 37% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.

You'll have about 13.6 hours of daylight in August to explore — between the 9.1-hour midwinter low and the 14.9-hour summer high.

Park-wide, 2025 drew 3,656,350 recreation visits, down 4.4% from 3,822,759 in 2024.

Across the past decade overall visitation has eased about 28.2%, so August may feel a touch quieter than it once did.