18.07
sat
sat
Day
66°F
NE 2 mph
Precip.
19%
19%
Night
54°F
S 12 mph
Precip.
89%
89%
19.07
sun
sun
Day
63°F
S 14 mph
Precip.
13%
13%
Night
48°F
S 5 mph
Precip.
17%
17%
20.07
mon
mon
Day
63°F
SW 7 mph
Precip.
1%
1%
Night
48°F
W 4 mph
Precip.
8%
8%
21.07
tue
tue
Day
61°F
SW 7 mph
Precip.
10%
10%
Night
48°F
W 3 mph
Precip.
7%
7%
22.07
wed
wed
Day
54°F
SW 5 mph
Precip.
11%
11%
Night
50°F
S 5 mph
Precip.
27%
27%
23.07
thu
thu
Day
61°F
SW 10 mph
Precip.
8%
8%
Night
52°F
S 4 mph
Precip.
11%
11%
24.07
fri
fri
Day
64°F
SW 4 mph
Precip.
4%
4%
Night
50°F
SE 1 mph
Precip.
17%
17%
sea water
temperature
temperature
| Seinajoki |
monthly
weather
weather
| Seinajoki |
current
weather
weather
| Seinajoki |
14 days
forecast
forecast
| Seinajoki |
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 63.9°F. The highest and lowest sea temperatures during the month were 66.2°F and 61.3°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.4°F. The highest and lowest sea temperatures during the month were 71.2°F and 58.5°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: 09:18
July 18, saturday
1200
66°F
NE
2 mph
2 mph
1500
63°F
NE
2 mph
2 mph
1800
59°F
S
6 mph
6 mph
2100
55°F
S
7 mph
7 mph
July 19, sunday
0000
54°F
S
12 mph
12 mph
0300
52°F
S
14 mph
14 mph
0600
52°F
S
15 mph
15 mph
0900
54°F
S
12 mph
12 mph
