How Crowded Is Biscayne National Park in May?

May runs about 1.2× Biscayne National Park's average month, which makes it a busy month here — roughly 10% of the park's yearly visitors come in May.

In a typical May the park sees about 57,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes May the 1st-busiest of the park's twelve months, sitting between the July peak (1.2×) and the October low (0.7×).

On our Best Time to Visit score May rates 18/100 ("Poor"), versus the top-rated October at 84/100 — the best overall balance of crowds and daylight.

Because June, July and August together draw about 27% 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 13.2 hours of daylight in May to explore — between the 10.4-hour midwinter low and the 13.6-hour summer high.

Park-wide, 2025 drew 486,567 recreation visits, down 5% from 512,213 in 2024.

Across the past decade overall visitation has risen about 17.1%, so a May visit is likely to feel busier than it did a few years ago.