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Sea Temperature in Cape Cod in September
Complete information on the sea temperature range in the Atlantic Ocean in Cape Cod in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Cape Cod. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Cape Cod in September
16°C
MINIMUN
19.5°C
AVERAGE
23°C
MAXIMUM
Historical Data of Water Temperature in September in Cape Cod
Water Temperature Chart for Atlantic Ocean in Cape Cod in September
Sea Temperature Table in Cape Cod in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 22°C | 21°C | 18°C | 20.3°C |
| Sep 2 | 22°C | 21°C | 16°C | 19.8°C |
| Sep 3 | 21°C | 21°C | 17°C | 20.0°C |
| Sep 4 | 21°C | 20°C | 17°C | 19.8°C |
| Sep 5 | 21°C | 21°C | 20°C | 20.8°C |
| Sep 6 | 22°C | 21°C | 20°C | 21.0°C |
| Sep 7 | 21°C | 21°C | 18°C | 20.0°C |
| Sep 8 | 21°C | 21°C | 20°C | 20.5°C |
| Sep 9 | 20°C | 22°C | 18°C | 20.0°C |
| Sep 10 | 21°C | 22°C | 17°C | 19.8°C |
| Sep 11 | 21°C | 21°C | 20°C | 20.3°C |
| Sep 12 | 21°C | 21°C | 20°C | 20.5°C |
| Sep 13 | 21°C | 20°C | 18°C | 19.5°C |
| Sep 14 | 21°C | 20°C | 17°C | 19.5°C |
| Sep 15 | 21°C | 20°C | 16°C | 19.5°C |
| Sep 16 | 20°C | 20°C | 20°C | 20.0°C |
| Sep 17 | 22°C | 19°C | 16°C | 19.3°C |
| Sep 18 | 21°C | 19°C | 18°C | 19.5°C |
| Sep 19 | 20°C | 19°C | 18°C | 19.3°C |
| Sep 20 | 20°C | 18°C | 16°C | 18.5°C |
| Sep 21 | 21°C | 18°C | 16°C | 18.3°C |
| Sep 22 | 20°C | 17°C | 20°C | 18.5°C |
| Sep 23 | 21°C | 18°C | 19°C | 18.8°C |
| Sep 24 | 20°C | 17°C | 16°C | 17.5°C |
| Sep 25 | 22°C | 18°C | 19°C | 19.0°C |
| Sep 26 | 21°C | 18°C | 20°C | 19.0°C |
| Sep 27 | 21°C | 18°C | 16°C | 18.0°C |
| Sep 28 | 21°C | 18°C | 19°C | 18.8°C |
| Sep 29 | 20°C | 19°C | 19°C | 18.8°C |
Cape Cod Climate and Swimming Opportunities in September
22°C
Average Day Air Temperature
14°C
Average Night Air Temperature
89 mm
Precipitation Amount per Month
9 days
Number of Rainy Days
12 hrs
Daylight
per Day
7 hrs
Sunshine
per Day
18 km/h
Average Wind Speed
76%
Average
humidity
Cape Cod lies within the Massachusetts in United States. The average daytime temperature in Cape Cod in September is 72°F (22°C), while the nighttime average is 58°F (14°C). There are typically nine rainy days during the month, with a total precipitation of 3.5 inches (89 mm). The daylight duration in September in Cape Cod is 12 hours, with an average of 7 hours of sunshine per day. The average wind speed in September is 11 mph (18 km/h), and the humidity level is around 76%.
The water temperature in Cape Cod in September ranges from 63°F to 70°F (17°C to 21°C). At the beginning of the month, the average temperature is around 68°F (20°C), shifting to 68°F (20°C) by mid-September and reaching 66°F (19°C) in the last ten days. Overall, the average sea temperature in Cape Cod for September is 68°F (20°C). Very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Cape Cod
What is the sea temperature in Cape Cod in September?
The water temperature in the Atlantic Ocean in Cape Cod in September ranges from 63°F to 70°F (17°C to 21°C).
Is it possible to swim in the Atlantic Ocean in Cape Cod in September?
The average sea temperature in Cape Cod in September is 68°F (20°C), and the air temperature is 72°F (22°C), so very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.