
#1 in September
14.2°C
NOAA Season Curve (May–Oct):
M
8.5°
J
13.8°
J
17.2°
A
17.6°
S
14.2°
O
9.5°
Historical 30-year sea surface temperatures across 5 coastlines in Finland for September. Derived from NOAA 0.25° blended satellite and in-situ marine observations.
Individual coordinate lookups from NOAA OISST v2.1 0.25° marine grid.