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Sea Temperature in Koper in September
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Complete information on the sea temperature range in the Adriatic Sea in Koper in September. Historical daily data. Climate details for September. 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 September
19°C
MINIMUN
23.5°C
AVERAGE
28°C
MAXIMUM
Historical Data of Water Temperature in September in Koper
Water Temperature Chart for Adriatic Sea in Koper in September
Sea Temperature Table in Koper in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 25°C | 25°C | 25°C | 25.5°C |
| Sep 2 | 24°C | 25°C | 25°C | 25.5°C |
| Sep 3 | 24°C | 25°C | 25°C | 25.5°C |
| Sep 4 | 24°C | 25°C | 25°C | 25.5°C |
| Sep 5 | 23°C | 24°C | 24°C | 24.5°C |
| Sep 6 | 24°C | 25°C | 24°C | 25.3°C |
| Sep 7 | 24°C | 24°C | 24°C | 24.8°C |
| Sep 8 | 24°C | 25°C | 24°C | 25.0°C |
| Sep 9 | 24°C | 25°C | 23°C | 24.8°C |
| Sep 10 | 24°C | 24°C | 23°C | 24.3°C |
| Sep 11 | 23°C | 24°C | 23°C | 24.0°C |
| Sep 12 | 24°C | 24°C | 23°C | 24.3°C |
| Sep 13 | 24°C | 24°C | 23°C | 24.3°C |
| Sep 14 | 23°C | 24°C | 22°C | 23.8°C |
| Sep 15 | 23°C | 24°C | 22°C | 23.8°C |
| Sep 16 | 24°C | 24°C | 22°C | 23.5°C |
| Sep 17 | 24°C | 24°C | 22°C | 23.5°C |
| Sep 18 | 23°C | 24°C | 21°C | 22.8°C |
| Sep 19 | 24°C | 24°C | 21°C | 22.8°C |
| Sep 20 | 23°C | 24°C | 21°C | 22.8°C |
| Sep 21 | 22°C | 23°C | 21°C | 22.0°C |
| Sep 22 | 22°C | 24°C | 20°C | 22.3°C |
| Sep 23 | 22°C | 23°C | 20°C | 21.8°C |
| Sep 24 | 22°C | 23°C | 20°C | 21.8°C |
| Sep 25 | 21°C | 23°C | 20°C | 21.3°C |
| Sep 26 | 22°C | 23°C | 20°C | 21.5°C |
| Sep 27 | 22°C | 22°C | 19°C | 21.0°C |
| Sep 28 | 22°C | 22°C | 19°C | 21.0°C |
| Sep 29 | 22°C | 23°C | 19°C | 21.3°C |
Koper Climate and Swimming Opportunities in September
22°C
Average Day Air Temperature
15°C
Average Night Air Temperature
114 mm
Precipitation Amount per Month
10 days
Number of Rainy Days
12 hrs
Daylight
per Day
7 hrs
Sunshine
per Day
8 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 September is 22°C (72°F), while the nighttime average is 15°C (59°F). There are typically 10 rainy days during the month, with a total precipitation of 114 mm (4.5 inches). The daylight duration in September in Koper is 12 hours, with an average of 7 hours of sunshine per day. The average wind speed in September is 8 km/h (5 mph), and the humidity level is around 71%.
The water temperature in Koper in September ranges from 21°C to 25°C (70°F to 77°F). At the beginning of the month, the average temperature is around 25°C (77°F), shifting to 24°C (75°F) by mid-September and reaching 22°C (72°F) in the last ten days. Overall, the average sea temperature in Koper for September is 24°C (75°F). Optimal swimming conditions. The water is warm, and the air is comfortable for drying off and sunbathing.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Koper
What is the sea temperature in Koper in September?
The water temperature in the Adriatic Sea in Koper in September ranges from 21°C to 25°C (70°F to 77°F).
Is it possible to swim in the Adriatic Sea in Koper in September?
The average sea temperature in Koper in September is 24°C (75°F), and the air temperature is 22°C (72°F), so optimal swimming conditions. The water is warm, and the air is comfortable for drying off and sunbathing.