World Resorts Finland Seinajoki Weather

Seinajoki 14 Days Forecast

27.08
thu
Day
64°F
NW 2 mph
Precip.
12%
Night
57°F
W 2 mph
Precip.
24%
28.08
fri
Day
66°F
NE 6 mph
Precip.
2%
Night
57°F
NW 6 mph
Precip.
26%
29.08
sat
Day
64°F
NW 12 mph
Precip.
15%
Night
57°F
N 12 mph
Precip.
31%
30.08
sun
Day
68°F
NE 13 mph
Precip.
5%
Night
55°F
N 5 mph
Precip.
43%
31.08
mon
Day
59°F
N 6 mph
Precip.
48%
Night
57°F
N 4 mph
Precip.
29%
01.09
tue
Day
57°F
SW 6 mph
Precip.
63%
Night
54°F
S 5 mph
Precip.
43%
02.09
wed
Day
63°F
S 4 mph
Precip.
8%
Night
55°F
SE 3 mph
Precip.
40%
03.09
thu
Day
61°F
W 4 mph
Precip.
26%
Night
54°F
E 3 mph
Precip.
77%
04.09
fri
Day
61°F
NW 6 mph
Precip.
19%
Night
52°F
NW 4 mph
Precip.
32%
05.09
sat
Day
46°F
W 14 mph
Precip.
81%
Night
45°F
SW 11 mph
Precip.
72%
06.09
sun
Day
48°F
S 9 mph
Precip.
4%
Night
45°F
SE 5 mph
Precip.
30%
07.09
mon
Day
50°F
SE 9 mph
Precip.
17%
Night
45°F
SE 4 mph
Precip.
21%
08.09
tue
Day
50°F
S 6 mph
Precip.
22%
Night
43°F
SE 4 mph
Precip.
25%
09.09
wed
Day
54°F
N 4 mph
Precip.
3%
Night
50°F
N 5 mph
Precip.
26%

Sea water temperature in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 60.5°F. The highest and lowest sea temperatures during the month were 62.2°F and 58.1°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 56.7°F. The highest and lowest sea temperatures during the month were 61.9°F and 51.6°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

Sunniest months:
May 11 days
July 11 days
June 10 days
Warmest months:
July 70.0 °F
August 66.4 °F
June 65.3 °F
Warmest sea temp:
August 61.9 °F
July 61.1 °F
September 55.8 °F
Coldest months:
January 22.1 °F
February 25.2 °F
December 28.0 °F
Rainiest months:
July 5 days
August 5 days
September 3 days
Windiest months:
March 8.4 mph
December 7.9 mph
May 7.7 mph

Seinajoki on a weather map

Current weather
16:19
Seinajoki
+68°F
NE 2 mph
Feels like: +68°F
Precip.: 11%
Places in Finland:
Name
°F
Vaasa
+68°F
Vantaa
+66°F
Kemi
+55°F
Kotka
+63°F
Lappeenranta
+68°F
Lahti
+68°F
Oulu
+61°F
Pori
+68°F
Saariselka
+54°F
Savolinna
+64°F
Seinajoki
+68°F
Turku
+68°F
Helsinki
+66°F
Espoo
+68°F
Juvaskyla
+68°F
all places
24 Hours Forecast
Seinajoki
Local time: 16:19
August 27, thursday
1800
68°F
SW
1 mph
2100
59°F
W
3 mph
August 28, friday
0000
57°F
W
2 mph
0300
55°F
NE
3 mph
0600
54°F
NE
4 mph
0900
57°F
N
4 mph
1200
66°F
NE
6 mph
1500
68°F
N
8 mph
Units of measurement: °C / °F