Current sea water temperature:
+64.0°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: | 63.1°F |
| more information | |
14 days
forecast
forecast
| Helsinki |
monthly
weather
weather
| Helsinki |
Sea water temperature for the last 10 days:
| August 7 | 64.0°F | August 2 | 64.8°F |
| August 6 | 63.3°F | August 1 | 64.2°F |
| August 5 | 63.7°F | July 31 | 64.9°F |
| August 4 | 64.0°F | July 30 | 63.9°F |
| August 3 | 65.1°F | July 29 | 63.5°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.8°F. The highest and lowest sea temperatures during the month were 73.9°F and 56.5°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: 11:49
August 07, friday
1200
66°F
E
16 mph
16 mph
1500
66°F
E
15 mph
15 mph
1800
66°F
E
12 mph
12 mph
2100
59°F
SE
14 mph
14 mph
August 08, saturday
0000
55°F
E
11 mph
11 mph
0300
54°F
E
11 mph
11 mph
0600
54°F
E
9 mph
9 mph
0900
61°F
E
7 mph
7 mph
