Biscayne · September
Biscayne in September
September is a busy time to visit Biscayne — about as busy as August, busier than October.
Expect heavy crowds (8/10), highs near 90°F, and about 12.3 hours of daylight.
Crowd score
How busy it gets
Approaching peak season — expect full lots by mid-morning and busy overlooks.
About 73% of this park's busiest month.
Source: NPS Visitor Use Statistics, 2023–2025
Data: NPS visitation 2023–2025 · crowd scores computed Oct 2026 · alerts checked Oct 18, 2026. How this is calculated →
Computed from federal data · Methodology by Sharon Ben-Moshe
Visitation
Typical September visits vs. the year
September draws about 8% of Biscayne’s yearly visitors.
Typical monthly recreation visits, averaged over the most recent three full years.
Source: NPS Visitor Use Statistics, 2023–2025
Weather
September weather
- Avg high
- 90°F
- Avg low
- 79°F
- Precipitation
- 7.5"
- Sunrise
- 6:06 AM
- Sunset
- 6:24 PM
- Daylight
- 12.3h
Source: NOAA 1991–2020 climate normals, CAPE FLORIDA, FL US
What's open
Biscayne in September: access
Launch your own canoe or kayak from the ramp near the parking area, enjoy a picnic on the lawn, or stroll along the jetty trail.
No seasonal road or area closures reported for this park.
Source: NPS Data API
Conditions
Current alerts
- Caution
Boater Awareness
Please use caution in park waters due to navigational markers that may be missing or moved due to unforeseen circumstances.
- Information
Ride Share Services
Convoy Point grounds, Jetty Trail, kayak launch, and picnic area open at 7 a.m. and close at 5:30 p.m. If you are using a ride share service for transportation to and from the park, ensure ride share services can be onsite before closing time.
- Information
Camping and Docking at Boca Chita and Elliott Keys
Day Use Docking at Boca Chita and Elliott Keys: $25.00 Friday - Monday and Federal Holidays. Overnight Camping and Docking at Boca Chita and Elliott Keys: $60.00 per night. Payments must be made on site using the recreation.gov phone app.
Source: NPS Data API
Context
Biscayne crowds across the year
Alternatives
Quieter nearby in September
FAQ
Biscayne in September
How busy is Biscayne in September?
September rates 8/10 for crowds (Busy) at Biscayne National Park — about 73% of its busiest month. Typical recreation visits: 41,835.
What is the weather like at Biscayne in September?
In September, Biscayne averages a high of 90°F and a low of 79°F, with about 7.5 inches of precipitation.
How much does it cost to visit Biscayne?
Entry to Biscayne is free.
When is Biscayne least crowded?
Biscayne is quietest in October and November. If your dates are flexible, those months bring the thinnest crowds of the year.
How many hours of daylight does Biscayne get in September?
In mid-September, Biscayne gets about 12.3 hours of daylight, with sunrise around 6:06 AM and sunset around 6:24 PM.