Current sea water temperature:
+50.0°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 26 | 50.0°F | October 21 | 49.8°F |
| October 25 | 50.0°F | October 20 | 50.5°F |
| October 24 | 50.4°F | October 19 | 51.3°F |
| October 23 | 50.0°F | October 18 | 51.4°F |
| October 22 | 49.5°F | October 17 | 52.0°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: 05:19
October 27, tuesday
0600
50°F
NE
15 mph
15 mph
0900
50°F
NE
15 mph
15 mph
1200
52°F
NE
16 mph
16 mph
1500
52°F
NE
16 mph
16 mph
1800
52°F
NE
16 mph
16 mph
2100
52°F
NE
16 mph
16 mph
October 28, wednesday
0000
52°F
NE
16 mph
16 mph
0300
50°F
NE
14 mph
14 mph
