21.12
sun
sun
Day
39°F
SE 12 mph
Precip.
0%
0%
Night
34°F
SE 7 mph
Precip.
0%
0%
22.12
mon
mon
Day
32°F
SW 11 mph
Precip.
0%
0%
Night
27°F
SW 12 mph
Precip.
0%
0%
23.12
tue
tue
Day
23°F
SW 9 mph
Precip.
0%
0%
Night
21°F
SE 2 mph
Precip.
0%
0%
24.12
wed
wed
Day
25°F
E 17 mph
Precip.
0%
0%
Night
30°F
NE 12 mph
Precip.
24%
24%
25.12
thu
thu
Day
25°F
SW 4 mph
Precip.
0%
0%
Night
32°F
E 7 mph
Precip.
100%
100%
26.12
fri
fri
Day
34°F
NE 6 mph
Precip.
100%
100%
Night
32°F
SW 2 mph
Precip.
100%
100%
27.12
sat
sat
Day
34°F
NE 9 mph
Precip.
100%
100%
Night
32°F
S 13 mph
Precip.
100%
100%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 39.5°F. The highest and lowest sea temperatures during the month were 42.1°F and 37.2°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: 02:13
December 21, sunday
0300
39°F
E
13 mph
13 mph
0600
39°F
E
11 mph
11 mph
0900
41°F
SE
11 mph
11 mph
1200
39°F
SE
12 mph
12 mph
1500
37°F
SE
12 mph
12 mph
1800
36°F
SE
10 mph
10 mph
2100
36°F
SE
8 mph
8 mph
December 22, monday
0000
34°F
SE
7 mph
7 mph
