Sea Temperature in Portsmouth in December

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

6°C

MINIMUN

10.5°C

AVERAGE

15°C

MAXIMUM

Historical Data of Water Temperature in December in Portsmouth

Water Temperature Chart for Atlantic Ocean in Portsmouth in December

Sea Temperature Table in Portsmouth in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	13°C	11°C	14°C	12.3°C
Dec 2	12°C	11°C	13°C	11.8°C
Dec 3	12°C	12°C	13°C	12.0°C
Dec 4	12°C	11°C	13°C	11.8°C
Dec 5	11°C	11°C	12°C	11.3°C
Dec 6	11°C	11°C	12°C	11.5°C
Dec 7	10°C	11°C	12°C	11.0°C
Dec 8	10°C	10°C	11°C	10.8°C
Dec 9	9°C	10°C	11°C	10.8°C
Dec 10	10°C	11°C	12°C	11.0°C
Dec 11	10°C	11°C	12°C	11.0°C
Dec 12	10°C	11°C	13°C	11.3°C
Dec 13	10°C	11°C	12°C	10.8°C
Dec 14	9°C	10°C	12°C	10.5°C
Dec 15	10°C	10°C	12°C	10.5°C
Dec 16	10°C	10°C	11°C	10.5°C
Dec 17	10°C	10°C	11°C	10.5°C
Dec 18	10°C	10°C	11°C	10.8°C
Dec 19	10°C	10°C	10°C	10.3°C
Dec 20	10°C	10°C	10°C	10.3°C
Dec 21	10°C	10°C	9°C	10.0°C
Dec 22	9°C	10°C	9°C	9.5°C
Dec 23	9°C	9°C	9°C	9.3°C
Dec 24	8°C	9°C	9°C	9.0°C
Dec 25	8°C	9°C	9°C	9.0°C
Dec 26	7°C	10°C	7°C	8.5°C
Dec 27	7°C	9°C	7°C	8.3°C
Dec 28	8°C	9°C	6°C	8.3°C
Dec 29	8°C	9°C	6°C	8.3°C
Dec 30	8°C	10°C	6°C	8.5°C

Portsmouth Climate and Swimming Opportunities in December

8°C

Average Day Air Temperature

3°C

Average Night Air Temperature

87 mm

Precipitation Amount per Month

11 days

Number of Rainy Days

10 hrs

Daylight
per Day

5 hrs

Sunshine
per Day

16 km/h

Average Wind Speed

69%

Average
humidity

Portsmouth lies within the Virginia in United States. The average daytime temperature in Portsmouth in December is 47°F (8°C), while the nighttime average is 37°F (3°C). There are typically 11 rainy days during the month, with a total precipitation of 3.4 inches (87 mm). The daylight duration in December in Portsmouth is 10 hours, with an average of 5 hours of sunshine per day. The average wind speed in December is 10 mph (16 km/h), and the humidity level is around 69%.

The water temperature in Portsmouth in December ranges from 46°F to 54°F (8°C to 12°C). At the beginning of the month, the average temperature is around 54°F (12°C), shifting to 52°F (11°C) by mid-December and reaching 48°F (9°C) in the last ten days. Overall, the average sea temperature in Portsmouth for December is 50°F (10°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 Portsmouth

What is the sea temperature in Portsmouth in December?

The water temperature in the Atlantic Ocean in Portsmouth in December ranges from 46°F to 54°F (8°C to 12°C).

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

The average sea temperature in Portsmouth in December is 50°F (10°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.