
#1 in February
3.1°C
NOAA Season Curve (May–Oct):
M
8.6°
J
13.3°
J
17.0°
A
18.5°
S
16.2°
O
12.5°
N
8.9°
Historical 30-year sea surface temperatures across 9 coastlines in Poland for February. Derived from NOAA 0.25° blended satellite and in-situ marine observations.
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.
Individual coordinate lookups from NOAA 0.25° marine grid.