Sea Temperature in Koper in December

Complete information on the sea temperature range in the Adriatic Sea in Koper in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in Koper. 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 Koper in December

10°C

MINIMUN

13.5°C

AVERAGE

17°C

MAXIMUM

Historical Data of Water Temperature in December in Koper

Water Temperature Chart for Adriatic Sea in Koper in December

Sea Temperature Table in Koper in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	16°C	16°C	16°C	15.8°C
Dec 2	17°C	16°C	16°C	16.0°C
Dec 3	16°C	16°C	16°C	15.8°C
Dec 4	16°C	16°C	16°C	15.8°C
Dec 5	16°C	16°C	16°C	15.5°C
Dec 6	16°C	15°C	16°C	15.3°C
Dec 7	15°C	16°C	16°C	15.0°C
Dec 8	15°C	15°C	16°C	15.5°C
Dec 9	15°C	15°C	15°C	15.0°C
Dec 10	16°C	16°C	15°C	15.0°C
Dec 11	15°C	15°C	15°C	14.5°C
Dec 12	15°C	15°C	15°C	14.8°C
Dec 13	15°C	14°C	15°C	14.3°C
Dec 14	15°C	15°C	15°C	14.5°C
Dec 15	15°C	15°C	15°C	14.3°C
Dec 16	14°C	15°C	15°C	14.3°C
Dec 17	14°C	14°C	14°C	13.5°C
Dec 18	14°C	14°C	15°C	14.0°C
Dec 19	14°C	15°C	14°C	13.8°C
Dec 20	14°C	15°C	14°C	14.0°C
Dec 21	14°C	14°C	14°C	13.8°C
Dec 22	14°C	14°C	14°C	13.8°C
Dec 23	14°C	14°C	14°C	13.8°C
Dec 24	13°C	14°C	14°C	13.5°C
Dec 25	14°C	14°C	14°C	13.5°C
Dec 26	13°C	14°C	13°C	13.0°C
Dec 27	13°C	14°C	13°C	13.0°C
Dec 28	13°C	14°C	13°C	13.0°C
Dec 29	13°C	14°C	13°C	13.0°C
Dec 30	13°C	14°C	12°C	12.8°C

Koper Climate and Swimming Opportunities in December

8°C

Average Day Air Temperature

3°C

Average Night Air Temperature

106 mm

Precipitation Amount per Month

9 days

Number of Rainy Days

9 hrs

Daylight
per Day

3 hrs

Sunshine
per Day

9 km/h

Average Wind Speed

71%

Average
humidity

Koper lies within the Urban Municipality of Koper in Slovenia. The average daytime temperature in Koper in December is 8°C (46°F), while the nighttime average is 3°C (38°F). There are typically nine rainy days during the month, with a total precipitation of 106 mm (4.2 inches). The daylight duration in December in Koper is 9 hours, with an average of 3 hours of sunshine per day. The average wind speed in December is 9 km/h (6 mph), and the humidity level is around 71%.

The water temperature in Koper in December ranges from 12°C to 16°C (54°F to 61°F). At the beginning of the month, the average temperature is around 16°C (61°F), shifting to 14°C (57°F) by mid-December and reaching 13°C (55°F) in the last ten days. Overall, the average sea temperature in Koper for December is 14°C (57°F). The water is still cold, but for short swims, it can be manageable. Warm clothes are necessary after swimming.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Koper

What is the sea temperature in Koper in December?

The water temperature in the Adriatic Sea in Koper in December ranges from 12°C to 16°C (54°F to 61°F).

Is it possible to swim in the Adriatic Sea in Koper in December?

The average sea temperature in Koper in December is 14°C (57°F), and the air temperature is 8°C (46°F), so the water is still cold, but for short swims, it can be manageable. Warm clothes are necessary after swimming.