Current sea water temperature:
+57.0°F
| Minimum sea water temperature in August: | 74.3°F |
| Maximum sea water temperature in August: | 55.0°F |
| Average sea water temperature in August: | 63.0°F |
| more information | |
14 days
forecast
forecast
| Helsinki |
monthly
weather
weather
| Helsinki |
Sea water temperature for the last 10 days:
| August 27 | 57.0°F | August 22 | 58.3°F |
| August 26 | 56.7°F | August 21 | 57.6°F |
| August 25 | 56.3°F | August 20 | 58.6°F |
| August 24 | 57.4°F | August 19 | 59.5°F |
| August 23 | 59.0°F | August 18 | 58.5°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:
2025
2024
2023
The average sea water temperature in September of 2025 was 59.5°F. The highest and lowest sea temperatures during the month were 63.3°F and 54.0°F.
current
weather
weather
| Helsinki |
weather in
August
August
| Helsinki |
Best time for vacation in Helsinki
Helsinki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Helsinki
Local time: 17:16
August 27, thursday
1800
64°F
N
2 mph
2 mph
2100
61°F
N
3 mph
3 mph
August 28, friday
0000
59°F
E
1 mph
1 mph
0300
57°F
NE
1 mph
1 mph
0600
59°F
N
1 mph
1 mph
0900
61°F
N
2 mph
2 mph
1200
64°F
N
4 mph
4 mph
1500
66°F
N
6 mph
6 mph
