August is a tough month at Biscayne — it ranks 11th of the twelve here. Expect about 26% fewer visitors than May, the park's peak — 45,382 visits on average. Days run around 90°F by afternoon and 73°F at night, with 13 hours of daylight.
August against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| August (this page) | Tough | 45,382 | −26% | 90°F | 73°F | 0" | 13 h |
| January (best) | Good | 45,467 | −26% | 76°F | 55°F | 0" | 10.7 h |
| May (peak crowds) | Tough | 61,658 | peak | 86°F | 68°F | 0" | 13.4 h |
Weather figures are for the Convoy Point area — the Perrine 4W station. Visits are 2021–2025 averages; climate normals cover 1991–2020. Conditions vary across the park; check current status before you go.
Common questions
Is August a good time to visit Biscayne?
It is the tough season — doable with preparation, but the numbers say most people should pick another month. August ranks 11 of 12 at Biscayne on crowds, weather, daylight, and access together.
How crowded is Biscayne in August?
About 45,382 recreation visits on average — 26% below May, the park's peak.
How warm is Biscayne in August?
Average highs around 90°F and lows around 73°F at the Perrine 4W station.
← Biscayne in July · All months at Biscayne · Biscayne in September →