Sea Temperature in Cape Cod in December

Complete information on the sea temperature range in the Atlantic Ocean in Cape Cod in December. Historical daily data. Climate details for December. 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 December

39°F

MINIMUN

46°F

AVERAGE

52°F

MAXIMUM

Historical Data of Water Temperature in December in Cape Cod

Water Temperature Chart for Atlantic Ocean in Cape Cod in December

Sea Temperature Table in Cape Cod in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	48°C	46°C	50°C	48°C
Dec 2	48°C	46°C	48°C	48°C
Dec 3	48°C	46°C	50°C	48°C
Dec 4	48°C	46°C	48°C	47°C
Dec 5	48°C	46°C	48°C	47°C
Dec 6	46°C	46°C	48°C	47°C
Dec 7	46°C	46°C	48°C	47°C
Dec 8	45°C	46°C	46°C	46°C
Dec 9	45°C	45°C	46°C	46°C
Dec 10	45°C	46°C	48°C	46°C
Dec 11	46°C	46°C	48°C	47°C
Dec 12	46°C	46°C	46°C	46°C
Dec 13	46°C	46°C	46°C	46°C
Dec 14	45°C	45°C	45°C	45°C
Dec 15	45°C	45°C	45°C	45°C
Dec 16	45°C	45°C	45°C	45°C
Dec 17	45°C	45°C	45°C	45°C
Dec 18	45°C	45°C	45°C	45°C
Dec 19	45°C	46°C	45°C	45°C
Dec 20	45°C	46°C	43°C	45°C
Dec 21	45°C	45°C	43°C	45°C
Dec 22	45°C	45°C	43°C	44°C
Dec 23	43°C	43°C	43°C	43°C
Dec 24	43°C	43°C	43°C	43°C
Dec 25	43°C	43°C	43°C	43°C
Dec 26	43°C	43°C	43°C	43°C
Dec 27	43°C	43°C	41°C	43°C
Dec 28	43°C	43°C	41°C	43°C
Dec 29	43°C	45°C	41°C	43°C
Dec 30	41°C	45°C	41°C	43°C

Cape Cod Climate and Swimming Opportunities in December

43°F

Average Day Air Temperature

32°F

Average Night Air Temperature

4 in

Precipitation Amount per Month

12 days

Number of Rainy Days

9 hrs

Daylight
per Day

4 hrs

Sunshine
per Day

14 mph

Average Wind Speed

68%

Average
humidity

Cape Cod lies within the Massachusetts in United States. The average daytime temperature in Cape Cod in December is 44°F (6°C), while the nighttime average is 31°F (-0°C). There are typically 12 rainy days during the month, with a total precipitation of 4.4 inches (111 mm). The daylight duration in December in Cape Cod is 9 hours, with an average of 4 hours of sunshine per day. The average wind speed in December is 14 mph (23 km/h), and the humidity level is around 68%.

The water temperature in Cape Cod in December ranges from 43°F to 48°F (6°C to 9°C). At the beginning of the month, the average temperature is around 48°F (9°C), shifting to 46°F (8°C) by mid-December and reaching 43°F (6°C) in the last ten days. Overall, the average sea temperature in Cape Cod for December is 45°F (7°C). Still too cold for most swimmers. Only short dips in proper gear are advisable.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Cape Cod

What is the sea temperature in Cape Cod in December?

The water temperature in the Atlantic Ocean in Cape Cod in December ranges from 43°F to 48°F (6°C to 9°C).

Is it possible to swim in the Atlantic Ocean in Cape Cod in December?

The average sea temperature in Cape Cod in December is 45°F (7°C), and the air temperature is 44°F (6°C), so still too cold for most swimmers. Only short dips in proper gear are advisable.