27.08
thu
thu
Day
68°F
N 4 mph
Precip.
5%
5%
Night
61°F
E 4 mph
Precip.
20%
20%
28.08
fri
fri
Day
63°F
NE 2 mph
Precip.
17%
17%
Night
61°F
NW 6 mph
Precip.
23%
23%
29.08
sat
sat
Day
64°F
NW 16 mph
Precip.
18%
18%
Night
59°F
N 9 mph
Precip.
75%
75%
30.08
sun
sun
Day
63°F
NE 11 mph
Precip.
32%
32%
Night
59°F
NE 7 mph
Precip.
21%
21%
31.08
mon
mon
Day
66°F
NE 12 mph
Precip.
22%
22%
Night
61°F
NE 5 mph
Precip.
26%
26%
01.09
tue
tue
Day
66°F
NE 8 mph
Precip.
19%
19%
Night
57°F
E 6 mph
Precip.
19%
19%
02.09
wed
wed
Day
59°F
E 5 mph
Precip.
48%
48%
Night
54°F
NE 5 mph
Precip.
30%
30%
sea water
temperature
temperature
| Helsinki |
monthly
weather
weather
| Helsinki |
current
weather
weather
| Helsinki |
14 days
forecast
forecast
| Helsinki |
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 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.
Air temperature in Helsinki, °F
Precipitation total in Helsinki, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Helsinki
Helsinki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Helsinki
Local time: 18:27
August 27, thursday
2100
61°F
NE
5 mph
5 mph
August 28, friday
0000
61°F
E
4 mph
4 mph
0300
59°F
E
3 mph
3 mph
0600
59°F
E
4 mph
4 mph
0900
61°F
E
2 mph
2 mph
1200
63°F
NE
2 mph
2 mph
1500
66°F
N
6 mph
6 mph
1800
64°F
N
5 mph
5 mph
