29.12
mon
mon
Day
28°F
SE 19 mph
Precip.
66%
66%
Night
25°F
S 16 mph
Precip.
100%
100%
30.12
tue
tue
Day
25°F
S 26 mph
Precip.
60%
60%
Night
19°F
S 25 mph
Precip.
0%
0%
31.12
wed
wed
Day
19°F
S 21 mph
Precip.
0%
0%
Night
16°F
S 13 mph
Precip.
0%
0%
01.01
thu
thu
Day
21°F
NW 8 mph
Precip.
0%
0%
Night
27°F
NW 25 mph
Precip.
0%
0%
02.01
fri
fri
Day
25°F
NW 22 mph
Precip.
100%
100%
Night
28°F
W 20 mph
Precip.
100%
100%
03.01
sat
sat
Day
27°F
W 11 mph
Precip.
100%
100%
Night
34°F
NW 10 mph
Precip.
100%
100%
04.01
sun
sun
Day
28°F
SW 14 mph
Precip.
100%
100%
Night
28°F
SW 11 mph
Precip.
71%
71%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 39.1°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: 09:58
December 29, monday
1200
28°F
SE
19 mph
19 mph
1500
27°F
SE
15 mph
15 mph
1800
25°F
S
9 mph
9 mph
2100
25°F
S
14 mph
14 mph
December 30, tuesday
0000
25°F
S
16 mph
16 mph
0300
27°F
S
17 mph
17 mph
0600
28°F
SW
27 mph
27 mph
0900
27°F
S
26 mph
26 mph
