21.12
sun
sun
Day
39°F
SE 17 mph
Precip.
0%
0%
Night
36°F
SE 11 mph
Precip.
0%
0%
22.12
mon
mon
Day
28°F
SW 16 mph
Precip.
0%
0%
Night
25°F
SW 14 mph
Precip.
0%
0%
23.12
tue
tue
Day
23°F
S 12 mph
Precip.
0%
0%
Night
25°F
SE 10 mph
Precip.
0%
0%
24.12
wed
wed
Day
27°F
SE 14 mph
Precip.
0%
0%
Night
28°F
E 12 mph
Precip.
0%
0%
25.12
thu
thu
Day
36°F
E 21 mph
Precip.
63%
63%
Night
36°F
SE 16 mph
Precip.
0%
0%
26.12
fri
fri
Day
37°F
S 16 mph
Precip.
0%
0%
Night
32°F
NW 5 mph
Precip.
0%
0%
27.12
sat
sat
Day
36°F
SE 18 mph
Precip.
43%
43%
Night
34°F
S 21 mph
Precip.
0%
0%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 39.4°F. The highest and lowest sea temperatures during the month were 42.1°F and 36.9°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 33.5°F. The highest and lowest sea temperatures during the month were 35.4°F and 32.0°F.
Air temperature in Kotka, °F
Precipitation total in Kotka, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Kotka
Kotka on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Kotka
Local time: 12:31
December 21, sunday
1500
37°F
SE
17 mph
17 mph
1800
36°F
SE
14 mph
14 mph
2100
36°F
SE
14 mph
14 mph
December 22, monday
0000
36°F
SE
11 mph
11 mph
0300
36°F
SE
10 mph
10 mph
0600
34°F
S
11 mph
11 mph
0900
34°F
S
16 mph
16 mph
1200
28°F
SW
16 mph
16 mph
