Current sea water temperature:
+55.8°F
| Minimum sea water temperature in October: | 58.5°F |
| Maximum sea water temperature in October: | 43.0°F |
| Average sea water temperature in October: | 50.4°F |
| more information | |
14 days
forecast
forecast
| Helsinki |
monthly
weather
weather
| Helsinki |
Sea water temperature for the last 10 days:
| October 6 | 55.8°F | October 1 | 55.8°F |
| October 5 | 54.7°F | September 30 | 55.2°F |
| October 4 | 55.4°F | September 29 | 55.4°F |
| October 3 | 55.9°F | September 28 | 55.0°F |
| October 2 | 55.0°F | September 27 | 54.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Helsinki?
Based on the data about daily sea water temperature for the last three years the warmest sea in Helsinki was noticed in August, July and September.
Monthly Sea Temperatures in Helsinki, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 60.2°F. The highest and lowest sea temperatures during the month were 65.1°F and 56.3°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 62.6°F. The highest and lowest sea temperatures during the month were 66.9°F and 58.5°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 58.0°F. The highest and lowest sea temperatures during the month were 60.8°F and 54.5°F.
current
weather
weather
| Helsinki |
weather in
October
October
| Helsinki |
Best time for vacation in Helsinki
Helsinki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Helsinki
Local time: 20:58
October 06, tuesday
2100
52°F
E
15 mph
15 mph
October 07, wednesday
0000
50°F
E
13 mph
13 mph
0300
48°F
E
11 mph
11 mph
0600
48°F
E
11 mph
11 mph
0900
48°F
E
11 mph
11 mph
1200
54°F
E
11 mph
11 mph
1500
55°F
E
10 mph
10 mph
1800
52°F
E
7 mph
7 mph
