Sea Temperature in Koper in April

Complete information on the sea temperature range in the Adriatic Sea in Koper in April. Historical daily data. Climate details for April. 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 April

10°C

MINIMUN

13.5°C

AVERAGE

17°C

MAXIMUM

Historical Data of Water Temperature in April in Koper

Water Temperature Chart for Adriatic Sea in Koper in April

Sea Temperature Table in Koper in April Over the Past Years

Day	2024	2023	2022	Average
Apr 1	13°C	12°C	11°C	12.3°C
Apr 2	13°C	11°C	11°C	12.0°C
Apr 3	13°C	12°C	11°C	12.3°C
Apr 4	13°C	12°C	11°C	12.3°C
Apr 5	13°C	12°C	12°C	12.8°C
Apr 6	13°C	12°C	12°C	12.8°C
Apr 7	12°C	13°C	12°C	12.8°C
Apr 8	12°C	13°C	12°C	12.8°C
Apr 9	12°C	12°C	12°C	12.8°C
Apr 10	12°C	13°C	12°C	13.0°C
Apr 11	12°C	13°C	13°C	13.3°C
Apr 12	12°C	13°C	13°C	13.3°C
Apr 13	12°C	14°C	13°C	13.5°C
Apr 14	12°C	14°C	13°C	13.5°C
Apr 15	12°C	13°C	13°C	13.3°C
Apr 16	12°C	13°C	13°C	13.5°C
Apr 17	12°C	14°C	14°C	14.0°C
Apr 18	12°C	13°C	14°C	13.8°C
Apr 19	12°C	14°C	14°C	13.8°C
Apr 20	12°C	14°C	14°C	13.8°C
Apr 21	13°C	13°C	14°C	13.8°C
Apr 22	13°C	14°C	14°C	14.0°C
Apr 23	13°C	14°C	15°C	14.3°C
Apr 24	13°C	15°C	15°C	14.5°C
Apr 25	14°C	14°C	15°C	14.5°C
Apr 26	14°C	15°C	15°C	14.5°C
Apr 27	15°C	15°C	15°C	15.0°C
Apr 28	15°C	15°C	15°C	15.0°C
Apr 29	14°C	15°C	16°C	15.0°C

Koper Climate and Swimming Opportunities in April

16°C

Average Day Air Temperature

9°C

Average Night Air Temperature

83 mm

Precipitation Amount per Month

10 days

Number of Rainy Days

13 hrs

Daylight
per Day

6 hrs

Sunshine
per Day

8 km/h

Average Wind Speed

67%

Average
humidity

Koper lies within the Urban Municipality of Koper in Slovenia. The average daytime temperature in Koper in April is 16°C (61°F), while the nighttime average is 9°C (47°F). There are typically 10 rainy days during the month, with a total precipitation of 83 mm (3.3 inches). The daylight duration in April in Koper is 13 hours, with an average of 6 hours of sunshine per day. The average wind speed in April is 8 km/h (5 mph), and the humidity level is around 67%.

The water temperature in Koper in April ranges from 11°C to 15°C (52°F to 59°F). At the beginning of the month, the average temperature is around 12°C (54°F), shifting to 13°C (55°F) by mid-April and reaching 14°C (57°F) in the last ten days. Overall, the average sea temperature in Koper for April is 13°C (55°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in April in Nearby Cities

Frequently Asked Questions About Water Temperatures in April in Koper

What is the sea temperature in Koper in April?

The water temperature in the Adriatic Sea in Koper in April ranges from 11°C to 15°C (52°F to 59°F).

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

The average sea temperature in Koper in April is 13°C (55°F), and the air temperature is 16°C (61°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.