Cape Kolka — Water Temperature in September

Water Temperature Range

12°C

minimum

15°C

average

20°C

maximum

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Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2025	2024	2023	2022
SEP 1	16°C	16°C	16°C	17°C
SEP 2	17°C	16°C	16°C	18°C
SEP 3	17°C	17°C	16°C	18°C
SEP 4	17°C	17°C	16°C	18°C
SEP 5	16°C	16°C	15°C	18°C
SEP 6	16°C	16°C	15°C	18°C
SEP 7	16°C	17°C	15°C	18°C
SEP 8	16°C	17°C	14°C	18°C
SEP 9	16°C	17°C	15°C	18°C
SEP 10	16°C	17°C	15°C	18°C
SEP 11	16°C	17°C	15°C	18°C
SEP 12	17°C	17°C	16°C	18°C
SEP 13	16°C	17°C	15°C	18°C
SEP 14	16°C	17°C	15°C	17°C
SEP 15	16°C	16°C	15°C	16°C
SEP 16	16°C	16°C	15°C	17°C
SEP 17	15°C	16°C	15°C	15°C
SEP 18	15°C	16°C	15°C	15°C
SEP 19	15°C	16°C	15°C	14°C
SEP 20	15°C	16°C	14°C	14°C
SEP 21	15°C	16°C	13°C	14°C
SEP 22	15°C	16°C	14°C	14°C
SEP 23	15°C	16°C	14°C	14°C
SEP 24	14°C	16°C	13°C	13°C
SEP 25	14°C	16°C	13°C	13°C
SEP 26	14°C	16°C	13°C	13°C
SEP 27	14°C	15°C	13°C	13°C
SEP 28	14°C	15°C	13°C	13°C
SEP 29	14°C	15°C	13°C	13°C
SEP 30	14°C	15°C	13°C	13°C

September: Climate and Swimming Opportunities

Average Night Air Temperature

9°C

Average Day Air Temperature

16°C

Precipitation Amount per Month

60 mm

Number of Rainy Days

Daylight per Day

13 hrs

Sunshine per Day

5 hrs

Average Wind Speed

14 km/h

Average Humidity

82%

With such a ratio between the average monthly temperatures of water and air, swimming feels very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.