Current sea water temperature:
+59.7°F
| Minimum sea water temperature in September: | 67.5°F |
| Maximum sea water temperature in September: | 51.3°F |
| Average sea water temperature in September: | 59.5°F |
| more information | |
14 days
forecast
forecast
| Kotka |
monthly
weather
weather
| Kotka |
Sea water temperature for the last 10 days:
| September 14 | 59.7°F | September 9 | 61.2°F |
| September 13 | 59.9°F | September 8 | 60.8°F |
| September 12 | 60.3°F | September 7 | 61.3°F |
| September 11 | 60.4°F | September 6 | 61.9°F |
| September 10 | 60.6°F | September 5 | 61.7°F |
Monthly sea water temperature, °F
When is the warmest sea in Kotka?
Based on the data about daily sea water temperature for the last three years the warmest sea in Kotka was noticed in August, July and September.
Monthly Sea Temperatures in Kotka, °F
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 July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 65.1°F. The highest and lowest sea temperatures during the month were 68.5°F and 62.1°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.
current
weather
weather
| Kotka |
weather in
September
September
| Kotka |
Best time for vacation in Kotka
Kotka on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Kotka
Local time: 04:48
September 15, tuesday
0600
50°F
SE
4 mph
4 mph
0900
52°F
SE
4 mph
4 mph
1200
54°F
NE
3 mph
3 mph
1500
55°F
N
7 mph
7 mph
1800
57°F
NE
6 mph
6 mph
2100
57°F
N
7 mph
7 mph
September 16, wednesday
0000
59°F
N
11 mph
11 mph
0300
57°F
NE
10 mph
10 mph
