Can you swim in Poland in September?
Yes, but expect a cool dip
Average sea
16°C
Feels
mild
Month
September
The short answer
The sea around Poland averages 16°C in September. It is swimmable but bracing. Confident swimmers and acclimatised locals will be fine; visitors used to bath-warm summer seas may prefer short dips.
Live conditions matter most
Monthly averages set expectations, but a specific beach today depends on wind, waves and local currents. Use the live map or any beach page to see right-now temperatures.
Top swimming beaches in Poland
Sopot Beach
Pomerania
Long Tricity beach with Europe's longest wooden pier.
Gdańsk Brzeźno
Pomerania
Wide pine-backed Gdańsk city beach.
Gdynia Orłowo
Pomerania
Cliff-flanked Gdynia bay.
Łeba
Pomerania
Family beach next to Słowiński dunes.
Hel Beach
Pomerania
Tip-of-peninsula Polish family beach.
Międzyzdroje
Pomerania
Wolin-island Polish resort beach.