Sea Temperature in Old Greenwich in December

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

41°F

MINIMUN

48°F

AVERAGE

55°F

MAXIMUM

Historical Data of Water Temperature in December in Old Greenwich

Water Temperature Chart for Atlantic Ocean in Old Greenwich in December

Sea Temperature Table in Old Greenwich in December Over the Past Years

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

Old Greenwich Climate and Swimming Opportunities in December

45°F

Average Day Air Temperature

30°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

10 mph

Average Wind Speed

65%

Average
humidity

Old Greenwich lies within the Connecticut in United States. The average daytime temperature in Old Greenwich in December is 44°F (7°C), while the nighttime average is 31°F (-1°C). There are typically 12 rainy days during the month, with a total precipitation of 3.9 inches (99 mm). The daylight duration in December in Old Greenwich is 9 hours, with an average of 4 hours of sunshine per day. The average wind speed in December is 11 mph (17 km/h), and the humidity level is around 65%.

The water temperature in Old Greenwich 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 Old Greenwich 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 Old Greenwich

What is the sea temperature in Old Greenwich in December?

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

Is it possible to swim in the Atlantic Ocean in Old Greenwich in December?

The average sea temperature in Old Greenwich in December is 48°F (9°C), and the air temperature is 44°F (7°C), so still too cold for most swimmers. Only short dips in proper gear are advisable.