23.08
sun
sun
Day

57°F
S 14 mph
Precip.
42%
42%
Night

57°F
SE 11 mph
Precip.
22%
22%
24.08
mon
mon
Day

59°F
S 11 mph
Precip.
18%
18%
Night

54°F
S 8 mph
Precip.
13%
13%
25.08
tue
tue
Day

64°F
S 9 mph
Precip.
4%
4%
Night

57°F
S 6 mph
Precip.
10%
10%
26.08
wed
wed
Day

68°F
W 2 mph
Precip.
2%
2%
Night

59°F
E 2 mph
Precip.
23%
23%
27.08
thu
thu
Day

66°F
N 4 mph
Precip.
6%
6%
Night

57°F
W 5 mph
Precip.
12%
12%
28.08
fri
fri
Day

64°F
N 7 mph
Precip.
16%
16%
Night

59°F
NW 9 mph
Precip.
20%
20%
29.08
sat
sat
Day

64°F
NW 11 mph
Precip.
9%
9%
Night

59°F
N 7 mph
Precip.
46%
46%
30.08
sun
sun
Day

64°F
NE 9 mph
Precip.
61%
61%
Night

59°F
N 6 mph
Precip.
15%
15%
31.08
mon
mon
Day

63°F
N 12 mph
Precip.
45%
45%
Night

57°F
N 3 mph
Precip.
49%
49%
01.09
tue
tue
Day

63°F
NE 10 mph
Precip.
32%
32%
Night

57°F
NE 6 mph
Precip.
85%
85%
02.09
wed
wed
Day

63°F
NE 8 mph
Precip.
39%
39%
Night

50°F
E 10 mph
Precip.
11%
11%
03.09
thu
thu
Day

61°F
NE 12 mph
Precip.
12%
12%
Night

50°F
E 8 mph
Precip.
16%
16%
04.09
fri
fri
Day

63°F
E 7 mph
Precip.
2%
2%
Night

52°F
SE 5 mph
Precip.
8%
8%
05.09
sat
sat
Day

61°F
W 7 mph
Precip.
16%
16%
Night

57°F
SW 10 mph
Precip.
24%
24%
sea water
temperature
temperature
| Helsinki |
monthly
weather
weather
| Helsinki |
current
weather
weather
| Helsinki |
7 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 60.8°F. The highest and lowest sea temperatures during the month were 65.1°F and 57.6°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: 23:58
August 24, monday
0000

57°F
SE
11 mph
11 mph
0300

55°F
SE
10 mph
10 mph
0600

54°F
SE
11 mph
11 mph
0900

57°F
S
11 mph
11 mph
1200

59°F
S
11 mph
11 mph
1500

64°F
S
10 mph
10 mph
1800

64°F
S
9 mph
9 mph
2100

55°F
SE
7 mph
7 mph


























