World Resorts Finland Kotka Weather

Kotka sea water temperature

Current sea water temperature:
+29.1°F
Minimum sea water temperature in February: 35.4°F
Maximum sea water temperature in February: 28.9°F
Average sea water temperature in February: 31.2°F

Sea water temperature for the last 10 days:

February 2 29.1°F January 28 30.2°F
February 1 29.3°F January 27 30.6°F
January 31 29.5°F January 26 30.4°F
January 30 29.7°F January 25 30.7°F
January 29 29.8°F January 24 30.9°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:
2025
2024
2023

The average sea water temperature in August of 2025 was 65.4°F. The highest and lowest sea temperatures during the month were 75.9°F and 59.4°F.

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 64.6°F. The highest and lowest sea temperatures during the month were 76.1°F and 56.1°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.

Best time for vacation in Kotka

Sunniest months:
July 15 days
June 14 days
May 13 days
Warmest months:
July 66.5 °F
August 65.5 °F
June 60.2 °F
Warmest sea temp:
August 64.4 °F
July 63.3 °F
September 59.4 °F
Coldest months:
January 26.5 °F
February 27.1 °F
March 32.5 °F
Rainiest months:
October 5 days
August 5 days
December 4 days
Windiest months:
December 14.7 mph
November 14.3 mph
October 13.9 mph

Kotka on a weather map

Kotka
+7°F
S 12 mph
Feels like: -8°F
Precip.: 0%
Places in Finland:
Name
°F
+5°F
+5°F
-4°F
+7°F
+5°F
0°F
-2°F
+7°F
0°F
-8°F
0°F
+1°F
+7°F
+5°F
-6°F
24 Hours Forecast
Kotka
Local time: 03:07
February 03, tuesday
0600
5°F
S
9 mph
0900
5°F
S
9 mph
1200
10°F
S
8 mph
1500
12°F
SE
7 mph
1800
9°F
SE
8 mph
2100
7°F
SE
6 mph
February 04, wednesday
0000
5°F
SE
6 mph
0300
3°F
SE
6 mph
Units of measurement: °C / °F