26.04
sun
sun
Day
37°F
S 16 mph
Precip.
0%
0%
Night
28°F
SE 6 mph
Precip.
0%
0%
27.04
mon
mon
Day
45°F
S 12 mph
Precip.
0%
0%
Night
32°F
SE 8 mph
Precip.
0%
0%
28.04
tue
tue
Day
39°F
S 16 mph
Precip.
0%
0%
Night
32°F
SE 7 mph
Precip.
0%
0%
29.04
wed
wed
Day
43°F
S 13 mph
Precip.
0%
0%
Night
32°F
SE 4 mph
Precip.
0%
0%
30.04
thu
thu
Day
52°F
SE 2 mph
Precip.
0%
0%
Night
45°F
E 2 mph
Precip.
0%
0%
01.05
fri
fri
Day
59°F
E 9 mph
Precip.
0%
0%
Night
43°F
SE 8 mph
Precip.
0%
0%
02.05
sat
sat
Day
46°F
SE 10 mph
Precip.
0%
0%
Night
45°F
E 11 mph
Precip.
0%
0%
sea water
temperature
temperature
| Seinajoki |
monthly
weather
weather
| Seinajoki |
current
weather
weather
| Seinajoki |
14 days
forecast
forecast
| Seinajoki |
Sea water temperature in April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 38.2°F. The highest and lowest sea temperatures during the month were 45.3°F and 31.3°F.
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 45.2°F. The highest and lowest sea temperatures during the month were 49.3°F and 39.2°F.
Air temperature in Seinajoki, °F
Precipitation total in Seinajoki, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Seinajoki
Seinajoki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Seinajoki
Local time: 10:54
April 26, sunday
1200
37°F
S
16 mph
16 mph
1500
39°F
S
16 mph
16 mph
1800
39°F
S
12 mph
12 mph
2100
36°F
S
9 mph
9 mph
April 27, monday
0000
28°F
SE
6 mph
6 mph
0300
28°F
SE
5 mph
5 mph
0600
28°F
SE
5 mph
5 mph
0900
37°F
SE
8 mph
8 mph
