Sea Temperature in Dewey Beach in December

Complete information on the sea temperature range in the Atlantic Ocean in Dewey Beach in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in Dewey Beach. 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 Dewey Beach in December

39°F

MINIMUN

46°F

AVERAGE

54°F

MAXIMUM

Historical Data of Water Temperature in December in Dewey Beach

Water Temperature Chart for Atlantic Ocean in Dewey Beach in December

Sea Temperature Table in Dewey Beach in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	54°C	50°C	52°C	51°C
Dec 2	52°C	50°C	52°C	51°C
Dec 3	52°C	50°C	52°C	51°C
Dec 4	50°C	52°C	52°C	51°C
Dec 5	50°C	50°C	52°C	50°C
Dec 6	48°C	50°C	52°C	50°C
Dec 7	48°C	50°C	52°C	50°C
Dec 8	48°C	48°C	50°C	50°C
Dec 9	46°C	48°C	48°C	49°C
Dec 10	46°C	48°C	50°C	48°C
Dec 11	48°C	48°C	52°C	50°C
Dec 12	46°C	48°C	50°C	48°C
Dec 13	48°C	48°C	48°C	48°C
Dec 14	46°C	48°C	46°C	47°C
Dec 15	45°C	50°C	48°C	48°C
Dec 16	46°C	50°C	48°C	49°C
Dec 17	46°C	48°C	48°C	48°C
Dec 18	46°C	48°C	46°C	48°C
Dec 19	46°C	48°C	46°C	47°C
Dec 20	46°C	48°C	46°C	47°C
Dec 21	46°C	48°C	46°C	47°C
Dec 22	46°C	48°C	46°C	47°C
Dec 23	45°C	45°C	45°C	46°C
Dec 24	45°C	46°C	45°C	46°C
Dec 25	45°C	45°C	45°C	45°C
Dec 26	45°C	46°C	43°C	45°C
Dec 27	43°C	46°C	43°C	45°C
Dec 28	43°C	46°C	43°C	45°C
Dec 29	45°C	46°C	41°C	45°C
Dec 30	45°C	46°C	41°C	45°C

Dewey Beach Climate and Swimming Opportunities in December

46°F

Average Day Air Temperature

32°F

Average Night Air Temperature

4 in

Precipitation Amount per Month

11 days

Number of Rainy Days

9 hrs

Daylight
per Day

5 hrs

Sunshine
per Day

11 mph

Average Wind Speed

71%

Average
humidity

Dewey Beach lies within the Delaware in United States. The average daytime temperature in Dewey Beach in December is 47°F (8°C), while the nighttime average is 32°F (0°C). There are typically 11 rainy days during the month, with a total precipitation of 3.7 inches (93 mm). The daylight duration in December in Dewey Beach is 9 hours, with an average of 5 hours of sunshine per day. The average wind speed in December is 11 mph (18 km/h), and the humidity level is around 71%.

The water temperature in Dewey Beach in December ranges from 45°F to 52°F (7°C to 11°C). At the beginning of the month, the average temperature is around 50°F (10°C), shifting to 48°F (9°C) by mid-December and reaching 46°F (8°C) in the last ten days. Overall, the average sea temperature in Dewey Beach for December is 48°F (9°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 Dewey Beach

What is the sea temperature in Dewey Beach in December?

The water temperature in the Atlantic Ocean in Dewey Beach in December ranges from 45°F to 52°F (7°C to 11°C).

Is it possible to swim in the Atlantic Ocean in Dewey Beach in December?

The average sea temperature in Dewey Beach in December is 48°F (9°C), and the air temperature is 47°F (8°C), so still too cold for most swimmers. Only short dips in proper gear are advisable.