Swimming in Cape Cod National Seashore in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Cape Cod National Seashore in september 2025.
In september, according to seasonal norms, the sea temperature in Cape Cod National Seashore is:
Minimum: 61°F
Average: 65°F
Maximum: 68°F
Other useful seasonal weather averages in september:
- Outside temperature: 64°F to 68°F
- Most common weather: "Clear/Sunny"
- The wind blows at 11.2mph
- It rains a total of 3.1in, over 5 day(s).
Should we swim in Cape Cod National Seashore in september?
Yes... and no. The water temperature in Cape Cod National Seashore in september is cool
Swimming in september on the beaches of Cape Cod National Seashore is possible but the sea water is cool. So even though the sea temperature sometimes climbs to 68°F, it can also be as low as 61°F! Note that the average is 65°F.
Note also that in september, the climate is good with an average outside temperature of 66°F, 3.1in of precipitation (over 5 days) and 83.38 % humidity.
Water and normal seasonal temperatures in Cape Cod National Seashore in september
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 61°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 65°F | ||
| Wind speed | 16.8mph | ||
| Wind temperature | 65°F | ||
| Precipitation | 3.1in | ||
| Number of days of rain | 5 jour(s) (17%) | ||
| Humidity | 84% | ||
| Visibility in kilometers | 9.56km | ||
| Cloud cover | 32% | ||
| Our opinion | cool swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Cape Cod National Seashore
Swim elsewhere in the United States (USA) in september
| City | Average T° | Min. T° | Max. T° | Our opinion | California in september | 67°F | 70°F | cool swimming | Washington D. C. in september | 75°F | 77°F | pleasant swimming | Boston in september | 65°F | 68°F | cool swimming | Miami (Florida) in september | 86°F | 87°F | ideal swimming | New York City in september | 70°F | 74°F | pleasant swimming | Seattle in september | 54°F | 56°F | freezing swimming | Houston in september | 84°F | 88°F | ideal swimming | Long Beach (Washington) in september | 58°F | 60°F | freezing swimming | Myrtle Beach in september | 81°F | 83°F | ideal swimming | Philadelphia in september | 72°F | 76°F | pleasant swimming | Portland in september | 56°F | 59°F | freezing swimming | Atlantic City in september | 72°F | 76°F | pleasant swimming | Baltimore in september | 74°F | 77°F | pleasant swimming | Bar Harbor (Maine) in september | 56°F | 59°F | freezing swimming | Brooklyn in september | 71°F | 74°F | pleasant swimming | Carolina Beach in september | 81°F | 83°F | ideal swimming | Gulf Shores (Alabama) in september | 84°F | 86°F | ideal swimming | Hampton Beach in september | 63°F | 67°F | cold swimming | Maryland in september | 74°F | 77°F | pleasant swimming | Mobile (Alabama) in september | 84°F | 86°F | ideal swimming |
Swim in the United States (USA) in september: sea temperature by city