Sea Temperature in San Sebastian in December

Complete information on the sea temperature range in the Bay of Biscay in San Sebastian in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in San Sebastian. 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 San Sebastian in December

12°C

MINIMUN

14°C

AVERAGE

16°C

MAXIMUM

Historical Data of Water Temperature in December in San Sebastian

Water Temperature Chart for Bay of Biscay in San Sebastian in December

Sea Temperature Table in San Sebastian in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	15°C	16°C	15°C	15.3°C
Dec 2	15°C	16°C	16°C	15.3°C
Dec 3	15°C	16°C	15°C	15.3°C
Dec 4	15°C	16°C	15°C	15.3°C
Dec 5	15°C	16°C	15°C	15.3°C
Dec 6	15°C	16°C	16°C	15.3°C
Dec 7	15°C	16°C	16°C	15.5°C
Dec 8	15°C	15°C	16°C	15.3°C
Dec 9	15°C	15°C	16°C	15.3°C
Dec 10	14°C	15°C	15°C	14.8°C
Dec 11	14°C	15°C	16°C	14.8°C
Dec 12	14°C	16°C	15°C	14.8°C
Dec 13	14°C	15°C	15°C	14.8°C
Dec 14	14°C	16°C	14°C	14.5°C
Dec 15	14°C	15°C	15°C	14.5°C
Dec 16	14°C	15°C	15°C	14.3°C
Dec 17	14°C	15°C	15°C	14.5°C
Dec 18	13°C	15°C	15°C	14.3°C
Dec 19	13°C	15°C	15°C	14.0°C
Dec 20	14°C	15°C	15°C	14.5°C
Dec 21	14°C	15°C	15°C	14.3°C
Dec 22	14°C	15°C	15°C	14.3°C
Dec 23	14°C	15°C	14°C	14.0°C
Dec 24	14°C	15°C	14°C	14.0°C
Dec 25	14°C	15°C	15°C	14.3°C
Dec 26	14°C	15°C	15°C	14.3°C
Dec 27	14°C	14°C	15°C	14.0°C
Dec 28	14°C	14°C	14°C	13.8°C
Dec 29	14°C	14°C	14°C	13.8°C
Dec 30	13°C	14°C	14°C	13.5°C

San Sebastian Climate and Swimming Opportunities in December

13°C

Average Day Air Temperature

7°C

Average Night Air Temperature

129 mm

Precipitation Amount per Month

14 days

Number of Rainy Days

9 hrs

Daylight
per Day

3 hrs

Sunshine
per Day

15 km/h

Average Wind Speed

77%

Average
humidity

San Sebastian lies within the Basque Country in Spain. The average daytime temperature in San Sebastian in December is 13°C (56°F), while the nighttime average is 7°C (44°F). There are typically 14 rainy days during the month, with a total precipitation of 129 mm (5.1 inches). The daylight duration in December in San Sebastian is 9 hours, with an average of 3 hours of sunshine per day. The average wind speed in December is 15 km/h (9 mph), and the humidity level is around 77%.

The water temperature in San Sebastian in December ranges from 13°C to 15°C (55°F to 59°F). At the beginning of the month, the average temperature is around 15°C (59°F), shifting to 15°C (59°F) by mid-December and reaching 14°C (57°F) in the last ten days. Overall, the average sea temperature in San Sebastian for December is 15°C (59°F). The water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in San Sebastian

What is the sea temperature in San Sebastian in December?

The water temperature in the Bay of Biscay in San Sebastian in December ranges from 13°C to 15°C (55°F to 59°F).

Is it possible to swim in the Bay of Biscay in San Sebastian in December?

The average sea temperature in San Sebastian in December is 15°C (59°F), and the air temperature is 13°C (56°F), so the water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.