28.04
tue
tue
Day
39°F
S 15 mph
Precip.
0%
0%
Night
30°F
SE 6 mph
Precip.
0%
0%
29.04
wed
wed
Day
43°F
SE 6 mph
Precip.
0%
0%
Night
37°F
NE 6 mph
Precip.
62%
62%
30.04
thu
thu
Day
55°F
SE 8 mph
Precip.
0%
0%
Night
46°F
E 6 mph
Precip.
0%
0%
01.05
fri
fri
Day
61°F
E 6 mph
Precip.
0%
0%
Night
46°F
N 6 mph
Precip.
0%
0%
02.05
sat
sat
Day
55°F
E 11 mph
Precip.
0%
0%
Night
41°F
E 9 mph
Precip.
0%
0%
03.05
sun
sun
Day
43°F
E 14 mph
Precip.
0%
0%
Night
39°F
NE 9 mph
Precip.
86%
86%
04.05
mon
mon
Day
41°F
E 6 mph
Precip.
74%
74%
Night
39°F
NE 6 mph
Precip.
0%
0%
05.05
tue
tue
Day
54°F
E 9 mph
Precip.
0%
0%
Night
43°F
E 4 mph
Precip.
0%
0%
06.05
wed
wed
Day
61°F
NE 5 mph
Precip.
0%
0%
Night
46°F
NE 4 mph
Precip.
0%
0%
07.05
thu
thu
Day
63°F
NE 9 mph
Precip.
0%
0%
Night
52°F
NE 9 mph
Precip.
0%
0%
08.05
fri
fri
Day
64°F
NE 14 mph
Precip.
0%
0%
Night
54°F
NE 11 mph
Precip.
0%
0%
09.05
sat
sat
Day
61°F
NE 14 mph
Precip.
0%
0%
Night
48°F
NE 6 mph
Precip.
0%
0%
10.05
sun
sun
Day
66°F
NW 5 mph
Precip.
0%
0%
Night
55°F
N 7 mph
Precip.
65%
65%
11.05
mon
mon
Day
57°F
NW 8 mph
Precip.
0%
0%
Night
52°F
NE 11 mph
Precip.
0%
0%
sea water
temperature
temperature
| Seinajoki |
monthly
weather
weather
| Seinajoki |
current
weather
weather
| Seinajoki |
7 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 38.4°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: 11:31
April 28, tuesday
1200
39°F
S
15 mph
15 mph
1500
41°F
S
16 mph
16 mph
1800
41°F
S
12 mph
12 mph
2100
36°F
S
10 mph
10 mph
April 29, wednesday
0000
30°F
SE
6 mph
6 mph
0300
28°F
SE
6 mph
6 mph
0600
28°F
SE
4 mph
4 mph
0900
37°F
SE
6 mph
6 mph
