Water temperature in Ustka in September

Is it warm enough to swim in Ustka in September? Average water temperature in Ustka in September is 16.7°C and therefore is not suitable for comfortable swimming. The warmest sea in Ustka in September is 20.6°C, and the coldest is 13.3°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Ustka

Changes water temperature in Ustka in September 2025, 2024

To get an accurate forecast for the water temperature in Ustka for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Ustka, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 September	18.6°C	19.6°C	16.8°C	20.6°C
2 September	18.4°C	19°C	16.5°C	20.3°C
3 September	18.8°C	19.4°C	16.4°C	19.8°C
4 September	19°C	19.4°C	16.4°C	19.5°C
5 September	18.9°C	19.6°C	16.6°C	19.6°C
6 September	18.7°C	20.1°C	16.7°C	20.1°C
7 September	18.8°C	19.5°C	16.5°C	19.5°C
8 September	19°C	19.2°C	16.1°C	19.2°C
9 September	18.8°C	19°C	16.1°C	19.1°C
10 September	18.6°C	18.5°C	16.3°C	19°C
11 September	18.4°C	17.9°C	16.1°C	19°C
12 September	18.6°C	17.7°C	16°C	19°C
13 September	18.3°C	17.5°C	15.9°C	19.1°C
14 September	18.2°C	17.3°C	15.5°C	18.9°C
15 September	17.8°C	17°C	15.5°C	18.7°C

Day	2025	2024	Min	Max
16 September	17°C	15.6°C	15.4°C	18.3°C
17 September	17°C	15.3°C	15°C	18°C
18 September	16.8°C	15.6°C	15°C	18.1°C
19 September	16.8°C	15°C	14.9°C	18.1°C
20 September	17.2°C	14.6°C	14.6°C	18°C
21 September	17.5°C	14.7°C	14.7°C	17.9°C
22 September	17.1°C	15.3°C	14.5°C	17.4°C
23 September	16.8°C	15.6°C	14.8°C	17.6°C
24 September	16.6°C	16.5°C	14.5°C	17.9°C
25 September		16.2°C	14.5°C	17.3°C
26 September		15.6°C	14°C	17°C
27 September		15.6°C	13.8°C	17.2°C
28 September		15.7°C	13.8°C	17.6°C
29 September		15.4°C	13.5°C	16.8°C
30 September		15.4°C	13.3°C	17°C

Average water temperature in Ustka in September over a decade

2015	2016	2017	2018	2019
15.9°C	17.7°C	16.8°C	17.9°C	17.2°C

2020	2021	2022	2023	2024
17.1°C	16.7°C	15.8°C	17.9°C	17.1°C

Ustka sea state in September

Chart comparing the height of waves in Ustka in September over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Ustka water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Rowy	16.7°C	13.3°C	20.6°C
Jaroslawiec	16.7°C	13.4°C	20.7°C
Darlowo	16.7°C	13.5°C	20.5°C
Koszalin	16.5°C	13.1°C	20.2°C
Mielno	16.5°C	13.1°C	20.2°C
Sarbinowo	16.4°C	13.3°C	20.3°C
Debki	16.8°C	13.7°C	20.9°C
Karwia	16.8°C	13.7°C	21°C
Grzybowo	16.3°C	13.2°C	20.2°C
Jastrzebia Gora	16.9°C	13.5°C	21.3°C

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Our report for Ustka is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature