26.08
wed
wed
Day
64°F
E 3 mph
Precip.
4%
4%
Night
61°F
SE 4 mph
Precip.
23%
23%
27.08
thu
thu
Day
61°F
NW 7 mph
Precip.
11%
11%
Night
63°F
NW 7 mph
Precip.
16%
16%
28.08
fri
fri
Day
63°F
N 6 mph
Precip.
25%
25%
Night
61°F
NW 9 mph
Precip.
32%
32%
29.08
sat
sat
Day
59°F
NW 14 mph
Precip.
10%
10%
Night
63°F
NW 24 mph
Precip.
38%
38%
30.08
sun
sun
Day
61°F
NE 16 mph
Precip.
31%
31%
Night
61°F
NE 17 mph
Precip.
27%
27%
31.08
mon
mon
Day
61°F
NE 19 mph
Precip.
42%
42%
Night
61°F
NE 9 mph
Precip.
28%
28%
01.09
tue
tue
Day
61°F
N 14 mph
Precip.
50%
50%
Night
59°F
NE 11 mph
Precip.
32%
32%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 61.2°F. The highest and lowest sea temperatures during the month were 66.7°F and 56.8°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 61.4°F. The highest and lowest sea temperatures during the month were 65.1°F and 56.5°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: 04:01
August 26, wednesday
0600
59°F
S
7 mph
7 mph
0900
59°F
S
6 mph
6 mph
1200
64°F
E
3 mph
3 mph
1500
63°F
NE
11 mph
11 mph
1800
63°F
E
9 mph
9 mph
2100
61°F
E
7 mph
7 mph
August 27, thursday
0000
61°F
SE
4 mph
4 mph
0300
61°F
SW
5 mph
5 mph
