How Crowded Is Gulf Islands National Seashore in May?

May runs about 1.3× Gulf Islands National Seashore's average month, which makes it a busy month here — roughly 11% of the park's yearly visitors come in May.

In a typical May the park sees about 639,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes May the 3rd-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 May rates 48/100 ("Fair"), versus the top-rated November at 71/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical May weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 82°F and an overnight low around 65°F, with about 3.2" of precipitation.

That average of about 74°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 May instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 13.5 hours of daylight in May to explore — between the 10.1-hour midwinter low and the 13.9-hour summer high.

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 May visit is likely to feel busier than it did a few years ago.