Sea Temperature in Portoroz in December

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

10°C

MINIMUN

13.5°C

AVERAGE

17°C

MAXIMUM

Historical Data of Water Temperature in December in Portoroz

Water Temperature Chart for Adriatic Sea in Portoroz in December

Sea Temperature Table in Portoroz in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	16°C	16°C	16°C	15.8°C
Dec 2	16°C	16°C	16°C	15.8°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	15°C	15°C	16°C	15.0°C
Dec 7	16°C	15°C	15°C	15.0°C
Dec 8	15°C	16°C	15°C	15.3°C
Dec 9	15°C	15°C	15°C	15.0°C
Dec 10	15°C	15°C	14°C	14.3°C
Dec 11	15°C	15°C	15°C	14.5°C
Dec 12	15°C	14°C	15°C	14.5°C
Dec 13	15°C	15°C	15°C	14.5°C
Dec 14	14°C	15°C	15°C	14.3°C
Dec 15	14°C	14°C	15°C	14.0°C
Dec 16	14°C	14°C	14°C	13.8°C
Dec 17	14°C	14°C	14°C	13.5°C
Dec 18	14°C	14°C	14°C	13.5°C
Dec 19	13°C	14°C	14°C	13.5°C
Dec 20	14°C	14°C	14°C	13.8°C
Dec 21	13°C	14°C	14°C	13.5°C
Dec 22	14°C	14°C	14°C	13.5°C
Dec 23	13°C	13°C	14°C	13.0°C
Dec 24	13°C	14°C	13°C	13.0°C
Dec 25	13°C	14°C	14°C	13.3°C
Dec 26	13°C	14°C	13°C	13.0°C
Dec 27	13°C	14°C	12°C	12.8°C
Dec 28	13°C	14°C	13°C	13.0°C
Dec 29	13°C	14°C	12°C	12.8°C
Dec 30	12°C	13°C	12°C	12.3°C

Portoroz Climate and Swimming Opportunities in December

8°C

Average Day Air Temperature

4°C

Average Night Air Temperature

92 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

72%

Average
humidity

Portoroz lies within the Municipality of Piran in Slovenia. The average daytime temperature in Portoroz in December is 8°C (46°F), while the nighttime average is 4°C (38°F). There are typically nine rainy days during the month, with a total precipitation of 92 mm (3.6 inches). The daylight duration in December in Portoroz 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 72%.

The water temperature in Portoroz in December ranges from 12°C to 15°C (54°F to 59°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 Portoroz 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 Portoroz

What is the sea temperature in Portoroz in December?

The water temperature in the Adriatic Sea in Portoroz in December ranges from 12°C to 15°C (54°F to 59°F).

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

The average sea temperature in Portoroz 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.