26.04
sun
sun
Day
41°F
SE 22 mph
Precip.
0%
0%
Night
36°F
SE 16 mph
Precip.
0%
0%
27.04
mon
mon
Day
43°F
S 15 mph
Precip.
0%
0%
Night
37°F
S 17 mph
Precip.
0%
0%
28.04
tue
tue
Day
41°F
S 17 mph
Precip.
0%
0%
Night
37°F
SE 12 mph
Precip.
0%
0%
29.04
wed
wed
Day
43°F
SE 7 mph
Precip.
0%
0%
Night
39°F
SE 6 mph
Precip.
0%
0%
30.04
thu
thu
Day
48°F
NE 6 mph
Precip.
0%
0%
Night
45°F
S 5 mph
Precip.
0%
0%
01.05
fri
fri
Day
55°F
E 5 mph
Precip.
0%
0%
Night
50°F
E 7 mph
Precip.
0%
0%
02.05
sat
sat
Day
54°F
NE 10 mph
Precip.
0%
0%
Night
43°F
NE 6 mph
Precip.
0%
0%
sea water
temperature
temperature
| Helsinki |
monthly
weather
weather
| Helsinki |
current
weather
weather
| Helsinki |
14 days
forecast
forecast
| Helsinki |
Sea water temperature in April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 37.0°F. The highest and lowest sea temperatures during the month were 42.1°F and 32.2°F.
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 46.3°F. The highest and lowest sea temperatures during the month were 52.3°F and 41.9°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: 22:19
April 27, monday
0000
36°F
SE
16 mph
16 mph
0300
34°F
SE
16 mph
16 mph
0600
32°F
SE
16 mph
16 mph
0900
37°F
S
16 mph
16 mph
1200
43°F
S
15 mph
15 mph
1500
46°F
S
14 mph
14 mph
1800
45°F
S
14 mph
14 mph
2100
41°F
S
15 mph
15 mph
