How Crowded Is Gulf Islands National Seashore in December?

December runs about 0.7× Gulf Islands National Seashore's average month, which makes it a quiet month here — roughly 6% of the park's yearly visitors come in December.

In a typical December the park sees about 339,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes December the 10th-busiest of the park's twelve months, sitting between the July peak (1.4×) and the January low (0.6×).

On our Best Time to Visit score December rates 64/100 ("Good"), versus the top-rated November at 71/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical December weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 64°F and an overnight low around 45°F, with about 3.9" of precipitation.

That average of about 54°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 33% of annual visitors, choosing December instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 10.1 hours of daylight in December to explore — near the year-round minimum.

Park-wide, 2025 drew 7,576,923 recreation visits, down 2.9% from 7,801,176 in 2024.

Across the past decade overall visitation has risen about 54.2%, so a December visit is likely to feel busier than it did a few years ago.