Cape Cod National Seashore in September
September at Cape Cod National Seashore averages a daytime high near 71°F and an overnight low around 58°F, with about 3.6" of precipitation. Visitation runs about 1.5× the park's average month, which makes September a busy month here.
- Average low
- 58°F
- Average high
- 71°F
Range across the year: 26°F to 79°F
- Precipitation
- 3.6 in
- Daylight
- 12.3 hours
Roughly 13% of the park's yearly visitors come in September: about 502,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 3rd-busiest of the park's twelve months, sitting between the August peak (2.2×) and the January low (0.4×).
On our Best Time to Visit score September rates 59/100 ("Fair"). Our recommended month is May: the lightest crowds of the park's good-weather months.
The daily average of about 64°F is a comfortable range for hiking and being outdoors all day. These figures are 1991–2020 NOAA climate normals from the nearest station, about 16.5 miles from the park.
Because June, July and August together draw about 47% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 12.3 hours of daylight in September to explore — between the 9-hour midwinter low and the 15-hour summer high.
Park-wide, 2025 drew 3,682,771 recreation visits, down 3.7% from 3,823,242 in 2024.
Across the past decade overall visitation has eased about 7.8%, so September may feel a touch quieter than it once did.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 78°F / 64°F | 2.2× Very busy | 49 Fair |
| September | 71°F / 58°F | 1.5× Busy | 59 Fair |
| October | 61°F / 47°F | 1.0× Average | 56 Fair |
All twelve months at Cape Cod, with the best time to visit.
Things to do at Cape Cod in September
The National Park Service tags 18 Cape Cod activities for fall. Here are 8 of them. Each links to the park's own page for it.
- Hit the Links at Highland Links · 3-4 hours · reservation required
- Become a Cape Cod Junior Ranger
- Bike the Province Lands Bike Trail · 1-2 hours
- Hike the Atlantic White Cedar Swamp Trail · 30-60 minutes
- Hike the Doane Trail · 30-60 minutes
- Hike the Great Island Trail · 3-4 hours
- Hike the Pilgrim Spring Trail · 30-60 minutes
- Hike the Small's Swamp Trail · 30-60 minutes
Frequently Asked Questions
September averages a daytime high near 71°F and an overnight low around 58°F at Cape Cod National Seashore, with about 3.6 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 16.5 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is busy at Cape Cod National Seashore (about 1.5× the average month). Our best-time score rates it "Fair" at 59/100. Our recommended month is May.
The busiest month is August and the quietest is January. September sits at about 1.5× the park's average, or 13% of annual visitation.
A typical September sees about 502,000 recreation visits at Cape Cod National Seashore, based on National Park Service monthly counts from 1979–2025.
Where to stay near Cape Cod in September
Booking a September trip to Cape Cod National Seashore? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Cape Cod
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.