Sea Temperature in Cornwall in December

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

0°C

MINIMUN

3.5°C

AVERAGE

7°C

MAXIMUM

Historical Data of Water Temperature in December in Cornwall

Water Temperature Chart for Atlantic Ocean in Cornwall in December

Sea Temperature Table in Cornwall in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	6°C	6°C	5°C	5.8°C
Dec 2	6°C	6°C	5°C	5.8°C
Dec 3	6°C	6°C	5°C	5.8°C
Dec 4	5°C	5°C	4°C	4.8°C
Dec 5	5°C	5°C	5°C	5.0°C
Dec 6	5°C	5°C	4°C	4.8°C
Dec 7	5°C	5°C	5°C	4.8°C
Dec 8	5°C	5°C	5°C	4.8°C
Dec 9	4°C	5°C	5°C	4.8°C
Dec 10	4°C	4°C	5°C	4.3°C
Dec 11	3°C	4°C	5°C	4.0°C
Dec 12	3°C	4°C	4°C	3.8°C
Dec 13	4°C	4°C	4°C	4.0°C
Dec 14	4°C	4°C	4°C	4.0°C
Dec 15	3°C	4°C	3°C	3.3°C
Dec 16	4°C	4°C	3°C	3.5°C
Dec 17	2°C	3°C	3°C	3.0°C
Dec 18	2°C	3°C	2°C	2.5°C
Dec 19	3°C	3°C	2°C	3.0°C
Dec 20	3°C	2°C	3°C	2.8°C
Dec 21	3°C	3°C	2°C	2.8°C
Dec 22	3°C	3°C	3°C	3.0°C
Dec 23	3°C	3°C	3°C	3.0°C
Dec 24	2°C	3°C	3°C	2.8°C
Dec 25	3°C	2°C	3°C	2.5°C
Dec 26	2°C	2°C	3°C	2.5°C
Dec 27	2°C	2°C	3°C	2.3°C
Dec 28	2°C	2°C	3°C	2.3°C
Dec 29	1°C	2°C	2°C	1.8°C
Dec 30	1°C	2°C	2°C	1.8°C

Cornwall Climate and Swimming Opportunities in December

8°C

Average Day Air Temperature

3°C

Average Night Air Temperature

86 mm

Precipitation Amount per Month

18 days

Number of Rainy Days

7 hrs

Daylight
per Day

1 hrs

Sunshine
per Day

22 km/h

Average Wind Speed

91%

Average
humidity

Cornwall lies within the Prince Edward Island in Canada. The average daytime temperature in Cornwall in December is 8°C (46°F), while the nighttime average is 3°C (37°F). There are typically 18 rainy days during the month, with a total precipitation of 86 mm (3.4 inches). The daylight duration in December in Cornwall is 7 hours, with an average of 1 hours of sunshine per day. The average wind speed in December is 22 km/h (14 mph), and the humidity level is around 91%.

The water temperature in Cornwall in December ranges from 1°C to 6°C (34°F to 43°F). At the beginning of the month, the average temperature is around 5°C (41°F), shifting to 4°C (39°F) by mid-December and reaching 3°C (37°F) in the last ten days. Overall, the average sea temperature in Cornwall for December is 4°C (39°F). The water is freezing, and the air is still very cold. Even a brief dip can be risky. A wetsuit is highly recommended.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Cornwall

What is the sea temperature in Cornwall in December?

The water temperature in the Atlantic Ocean in Cornwall in December ranges from 1°C to 6°C (34°F to 43°F).

Is it possible to swim in the Atlantic Ocean in Cornwall in December?

The average sea temperature in Cornwall in December is 4°C (39°F), and the air temperature is 8°C (46°F), so the water is freezing, and the air is still very cold. Even a brief dip can be risky. A wetsuit is highly recommended.