World Resorts Finland Kotka Weather

Kotka sea water temperature

Current sea water temperature:
+29.7°F
Minimum sea water temperature in February: 35.4°F
Maximum sea water temperature in February: 28.8°F
Average sea water temperature in February: 31.1°F

Sea water temperature for the last 10 days:

February 23 29.7°F February 18 28.8°F
February 22 28.8°F February 17 28.8°F
February 21 28.8°F February 16 28.8°F
February 20 28.8°F February 15 28.8°F
February 19 28.8°F February 14 28.8°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
+9°F
W 9 mph
Feels like: -6°F
Precip.: 0%
Places in Finland:
Name
°F
+18°F
+10°F
+1°F
-2°F
+5°F
+9°F
-2°F
+10°F
+18°F
-6°F
+14°F
+12°F
+12°F
+12°F
+12°F
24 Hours Forecast
Kotka
Local time: 05:16
February 24, tuesday
0600
9°F
W
9 mph
0900
12°F
SW
9 mph
1200
21°F
W
9 mph
1500
25°F
SW
9 mph
1800
21°F
SW
8 mph
2100
16°F
SW
7 mph
February 25, wednesday
0000
12°F
S
6 mph
0300
7°F
S
6 mph
Units of measurement: °C / °F