18.03
wed
wed
Day

37°F
NE 14 mph
Precip.
0%
0%
Night

34°F
NE 14 mph
Precip.
0%
0%
19.03
thu
thu
Day

39°F
NE 8 mph
Precip.
0%
0%
Night

34°F
SE 6 mph
Precip.
0%
0%
20.03
fri
fri
Day

41°F
SE 4 mph
Precip.
0%
0%
Night

36°F
NE 6 mph
Precip.
0%
0%
21.03
sat
sat
Day

39°F
NE 11 mph
Precip.
0%
0%
Night

34°F
NE 9 mph
Precip.
0%
0%
22.03
sun
sun
Day

39°F
NE 12 mph
Precip.
0%
0%
Night

36°F
NE 11 mph
Precip.
0%
0%
23.03
mon
mon
Day

39°F
NE 14 mph
Precip.
0%
0%
Night

36°F
NE 14 mph
Precip.
0%
0%
24.03
tue
tue
Day

36°F
N 14 mph
Precip.
100%
100%
Night

34°F
NE 12 mph
Precip.
22%
22%
25.03
wed
wed
Day

39°F
E 11 mph
Precip.
0%
0%
Night

34°F
N 12 mph
Precip.
0%
0%
26.03
thu
thu
Day

36°F
NE 16 mph
Precip.
21%
21%
Night

36°F
NE 19 mph
Precip.
41%
41%
27.03
fri
fri
Day

37°F
NE 16 mph
Precip.
69%
69%
Night

34°F
NE 11 mph
Precip.
21%
21%
28.03
sat
sat
Day

37°F
E 11 mph
Precip.
88%
88%
Night

30°F
SE 14 mph
Precip.
0%
0%
29.03
sun
sun
Day

36°F
SE 13 mph
Precip.
0%
0%
Night

28°F
S 6 mph
Precip.
0%
0%
30.03
mon
mon
Day

32°F
SW 7 mph
Precip.
0%
0%
Night

28°F
W 7 mph
Precip.
0%
0%
31.03
tue
tue
Day

32°F
W 11 mph
Precip.
0%
0%
Night

30°F
W 10 mph
Precip.
0%
0%
sea water
temperature
temperature
| Helsinki |
monthly
weather
weather
| Helsinki |
current
weather
weather
| Helsinki |
7 days
forecast
forecast
| Helsinki |
Sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 31.3°F. The highest and lowest sea temperatures during the month were 32.9°F and 28.9°F.
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 39.3°F. The highest and lowest sea temperatures during the month were 43.3°F and 35.8°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: 08:30
March 18, wednesday
0900

36°F
NE
11 mph
11 mph
1200

37°F
NE
14 mph
14 mph
1500

39°F
NE
14 mph
14 mph
1800

37°F
NE
14 mph
14 mph
2100

36°F
NE
14 mph
14 mph
March 19, thursday
0000

34°F
NE
14 mph
14 mph
0300

34°F
NE
14 mph
14 mph
0600

34°F
NE
12 mph
12 mph



























