Swimming in Koszalin in september 2025: Average sea temperature in september and tide times in september 2025
Average sea temperature in Koszalin in september 2025.
In september, according to seasonal norms, the sea temperature in Koszalin is:
Minimum: 59°F
Average: 63°F
Maximum: 68°F
Other useful seasonal weather averages in september:
- Outside temperature: 57°F to 65°F
- Most common weather: "Clear/Sunny"
- The wind blows at 8.1mph
- It rains a total of 2.7in, over 4 day(s).
Should we swim in Koszalin in september?
Yes... and no. The water temperature in Koszalin in september is cool
Swimming in september on the beaches of Koszalin is possible but the sea water is cool. So even though the sea temperature sometimes climbs to 68°F, it can also be as low as 59°F! Note that the average is 63°F.
Note also that in september, the climate is good with an average outside temperature of 61°F, 2.7in of precipitation (over 4 days) and 82.29 % humidity.
Water and normal seasonal temperatures in Koszalin in september
| September | |||
| Average sea temperature | 63°F | ||
| Minimum sea temperature | 59°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 58°F | ||
| Wind speed | 13.1mph | ||
| Wind temperature | 56°F | ||
| Precipitation | 2.7in | ||
| Number of days of rain | 4 jour(s) (13%) | ||
| Humidity | 83% | ||
| Visibility in kilometers | 9.53km | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
Chart of the tides in september 2025
Tide times in september 2025 in Koszalin
Swim elsewhere in Poland in september
| City | Average T° | Min. T° | Max. T° | Our opinion | Gdansk in september | 64°F | 69°F | cool swimming | Szczecin in september | 63°F | 68°F | cool swimming | Władysławowo in september | 63°F | 68°F | cool swimming | Hel in september | 64°F | 69°F | cool swimming | Sopot in september | 64°F | 69°F | cool swimming |