Swimming in Poland in september 2025 Sea temperature by city in september
Do you want to go to the beach in Poland in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in Poland by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Poland in september 2025
Here, find the average sea temperature in Poland in september in several coastal cities.
North in september
64°F
min: 59°F / max: 69°F
63°F
min: 58°F / max: 68°F
Frombork
64°F
min: 58°F / max: 69°F
64°F
min: 59°F / max: 69°F
Rowy
63°F
min: 58°F / max: 68°F
Slowinski National Park
63°F
min: 58°F / max: 68°F
North West in september
63°F
min: 59°F / max: 68°F
63°F
min: 59°F / max: 68°F
Darłowo
63°F
min: 58°F / max: 68°F
Jarosławiec
63°F
min: 59°F / max: 68°F
Kołobrzeg
63°F
min: 58°F / max: 68°F
Pobierowo
63°F
min: 58°F / max: 68°F
Where should you go swimming in Poland in the month of september?
Swimming in Poland in september is cool (in the best case scenario)
In september in Poland swimming conditions vary by city. Details below:
Swimming in september in Gdansk, Koszalin, Szczecin, Władysławowo, Frombork, Hel, Kołobrzeg, Slowinski National Park, Sopot, Stegna, Świnoujście, Gdynia, Krynica Morska, Leba, Miedzyzdroje, Mielno, Puck, Sztutowo and Wolin is possible but the sea is generally cool. So though the sea temperature may sometimes reach 69°F, it can also go as low as 59°F. Note that the average is 64°F.
Swimming in september in Darłowo, Jarosławiec, Pobierowo, Rowy and Ustka is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 63°F (min: 58°F/max: 68°F).
Where to go swimming in Poland in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Gdansk
| September | |||
| Average sea temperature | 64°F | ||
| Minimum sea temperature | 59°F | ||
| Maximum sea temperature | 69°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 56°F | ||
| Precipitation | 3.3in | ||
| Number of days of precipitation | 5 jour(s) (16%) | ||
| Cloud cover | 41% | ||
| Our opinion | cool swimming |
More information on swimming in Gdansk in september
Koszalin
| 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 | ||
| Precipitation | 2.7in | ||
| Number of days of precipitation | 4 jour(s) (13%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
More information on swimming in Koszalin in september
Szczecin
| September | |||
| Average sea temperature | 63°F | ||
| Minimum sea temperature | 59°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 56°F | ||
| Precipitation | 1.9in | ||
| Number of days of precipitation | 2 jour(s) (8%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
More information on swimming in Szczecin in september
Władysławowo
| September | |||
| Average sea temperature | 63°F | ||
| Minimum sea temperature | 58°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 3.5in | ||
| Number of days of precipitation | 5 jour(s) (18%) | ||
| Cloud cover | 42% | ||
| Our opinion | cool swimming |
More information on swimming in Władysławowo in september
Darłowo
| September | |||
| Average sea temperature | 63°F | ||
| Minimum sea temperature | 58°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 2.7in | ||
| Number of days of precipitation | 4 jour(s) (13%) | ||
| Cloud cover | 39% | ||
| Our opinion | cold swimming |
List of coastal cities in Poland
| Gdansk in september | cool swimming |
| Koszalin in september | cool swimming |
| Szczecin in september | cool swimming |
| Władysławowo in september | cool swimming |
| Darłowo in september | cold swimming |
| Frombork in september | cool swimming |
| Hel in september | cool swimming |
| Jarosławiec in september | cold swimming |
| Kołobrzeg in september | cool swimming |
| Pobierowo in september | cold swimming |
| Rowy in september | cold swimming |
| Slowinski National Park in september | cool swimming |
| Sopot in september | cool swimming |
| Stegna in september | cool swimming |
| Świnoujście in september | cool swimming |
| Gdynia in september | cool swimming |
| Krynica Morska in september | cool swimming |
| Leba in september | cool swimming |
| Miedzyzdroje in september | cool swimming |
| Mielno in september | cool swimming |
| Puck in september | cool swimming |
| Sztutowo in september | cool swimming |
| Ustka in september | cold swimming |
| Wolin in september | cool swimming |