- Best time to visit Biscayne: January, February, November and December. The weather is at its most comfortable then, and crowds are lighter than at the peak.
- Busiest month: July, with about 62,570 visits in a typical recent year. That is 1.9 times as many as November.
- Quietest month: November (33,591 visits).
- Wettest month: August, with 10.2 inches on average.
Bar height: visitors that month, compared with the busiest month. Temperatures: average daily high and low (°F); rain and snow: monthly averages. Best marks the months we suggest.
Month by month
| Month | Crowds | Visits (typical) | High / low (°F) | Precipitation | Snow |
|---|---|---|---|---|---|
| January ★ | Busy | 40,284 | 76° / 55° | 2.0 in | 0 in |
| February ★ | Busy | 46,886 | 78° / 57° | 2.3 in | 0 in |
| March | Busiest | 56,901 | 80° / 59° | 2.3 in | 0 in |
| April | Busiest | 53,892 | 84° / 63° | 3.4 in | 0 in |
| May | Busiest | 53,629 | 86° / 68° | 5.6 in | 0 in |
| June | Busy | 47,080 | 89° / 72° | 10.1 in | 0 in |
| July | Busiest | 62,570 | 90° / 72° | 7.8 in | 0 in |
| August | Busy | 43,849 | 90° / 73° | 10.2 in | 0 in |
| September | Busy | 46,581 | 89° / 72° | 10.1 in | 0 in |
| October | Moderate | 37,049 | 86° / 69° | 7.6 in | 0 in |
| November ★ | Moderate | 33,591 | 81° / 63° | 2.9 in | 0 in |
| December ★ | Moderate | 35,732 | 78° / 58° | 2.3 in | 0 in |
Weather figures are NOAA 1991 to 2020 climate normals for the Perrine 4W station (10 feet above sea level), 10 miles from Dante Fascell Visitor Center. Visitor numbers are the median of 2022 to 2025 monthly recreation visits from the National Park Service.
By season
- Spring (March to May): 29% of the year’s visits; average highs 80° to 86°F.
- Summer (June to August): 28% of the year’s visits; average highs 89° to 90°F.
- Fall (September to November): 21% of the year’s visits; average highs 81° to 89°F.
- Winter (December to February): 22% of the year’s visits; average highs 76° to 78°F.
Weekends and holidays
Even in a quiet month, holiday weekends fill parking lots and campgrounds. The 2027 federal holidays to plan around:
- Martin Luther King Jr. Day: Monday, January 18
- Presidents Day: Monday, February 15
- Memorial Day: Monday, May 31
- Juneteenth: Saturday, June 19
- Independence Day: Sunday, July 4 (observed Monday, July 5)
- Labor Day: Monday, September 6
- Columbus Day and Indigenous Peoples Day: Monday, October 11
- Veterans Day: Thursday, November 11
- Thanksgiving: Thursday, November 25
See the crowd calendar for all 64 parks.
Weather, in the park service’s words
The park is situated in a subtropical climate, which ensures sunshine year-round. Winters are normally dry and mild, with occasional fronts bringing wind and little rain. Summer brings hot and humid weather with scattered thunderstorms in the afternoons. The average temperature in January is 68 degrees Fahrenheit and 82 in July. The average rainfall for the area is 2.17 inches in January and 3.95 inches in July. June to November is hurricane season.
From the National Park Service (public domain).
Today at Biscayne
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Alerts: National Park Service, checked hourly. Forecast: National Weather Service, for Dante Fascell Visitor Center. Always confirm on the official park site before you set out.
Sources
- National Park Service visitor use statistics (IRMA): monthly recreation visits, 2022 to 2025
- NOAA NCEI U.S. Climate Normals, 1991 to 2020 (monthly)
- National Park Service Data API: weather overview (public domain)
Last checked 1 November 2026.