#1 in September
16.2°C
NOAA Season Curve (May–Oct):
M
11.8°
J
16.5°
J
18.9°
A
19.4°
S
16.2°
O
11.8°
NOAA OISST v2.1 (1991–2020 30-YEAR CLIMATOLOGY)
PLPoland Sea Temperature in September
Historical 30-year sea surface temperatures across 9 coastlines in Poland for September. Derived from NOAA 0.25° blended satellite and in-situ marine observations.
Climatology Notice: Temperatures represent the 30-year long-term historical average (1991–2020 normal), not a live single-day sensor forecast.
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View 12-Month Annual Overview →Baltic Sea Extreme Seasonal Range
The Baltic Sea is a shallow, brackish semi-enclosed basin with low salinity (fed by large river basins) and restricted ocean exchange through the Danish Straits. This causes the widest annual water temperature swing in Europe: warming rapidly from 9.4°C in May to 18.6°C in August, then cooling quickly down to 2–4°C in winter.
Oceanographic Phenomenon:Brackish Semi-Enclosed Basin Dynamics
Thermal Lag Characteristic:Minimal deep thermal lag: the shallow brackish Baltic lacks deep-sea thermal inertia, causing water temperatures to drop precipitously by mid-September (14.5°C).
Peak Bathing Average:August (18.6°C)
Statutory Tourism Sources:
polska.travelpomorskie.travelkrokowa.plmiedzyzdroje.plvisit.swinoujscie.plPoland Beaches in September
Individual coordinate lookups from NOAA OISST v2.1 0.25° marine grid.
Showing 9 coastlines
Explore Sea Temperatures by Country
Spain(23.6°C)Albania(25.5°C)Montenegro(25.7°C)Turkey(27.2°C)Italy(25.9°C)Cyprus(27.7°C)Greece(25.4°C)France(22.4°C)Croatia(25.1°C)Malta(26.7°C)Bulgaria(25.1°C)Romania(24.7°C)Slovenia(25.4°C)Portugal(20.7°C)Poland(19°C)Sweden(18.3°C)Netherlands(18.5°C)Bosnia & Herzegovina(25.2°C)Monaco(24.6°C)Latvia(18.5°C)Estonia(18°C)Lithuania(18.8°C)Germany(18.6°C)Denmark(18°C)Norway(15.3°C)Belgium(18.7°C)United Kingdom(16.1°C)Ireland(15.9°C)Faroe Islands(10.9°C)Iceland(10.9°C)Finland(16.6°C)
