World Resorts Finland Seinajoki Weather

Seinajoki 7 Days Forecast

16.09
wed
Day
55°F
N 12 mph
Precip.
47%
Night
54°F
N 9 mph
Precip.
26%
17.09
thu
Day
57°F
NE 11 mph
Precip.
17%
Night
50°F
NE 7 mph
Precip.
9%
18.09
fri
Day
55°F
NE 9 mph
Precip.
32%
Night
50°F
N 8 mph
Precip.
32%
19.09
sat
Day
55°F
NE 11 mph
Precip.
26%
Night
54°F
N 12 mph
Precip.
76%
20.09
sun
Day
54°F
NE 11 mph
Precip.
30%
Night
48°F
NE 4 mph
Precip.
38%
21.09
mon
Day
55°F
SE 5 mph
Precip.
8%
Night
48°F
S 14 mph
Precip.
68%
22.09
tue
Day
45°F
S 6 mph
Precip.
46%
Night
50°F
S 7 mph
Precip.
43%

Sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 58.9°F. The highest and lowest sea temperatures during the month were 61.0°F and 55.8°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
20:27
Seinajoki
+54°F
N 9 mph
Feels like: +50°F
Precip.: 20%
Places in Finland:
Name
°F
Vaasa
+57°F
Vantaa
+59°F
Imatra
+59°F
Kemi
+55°F
Kotka
+61°F
Lappeenranta
+59°F
Lahti
+55°F
Oulu
+54°F
Pori
+55°F
Saariselka
+45°F
Savolinna
+55°F
Turku
+55°F
Helsinki
+59°F
Espoo
+57°F
Juvaskyla
+55°F
all places
24 Hours Forecast
Seinajoki
Local time: 20:27
September 16, wednesday
2100
54°F
N
9 mph
September 17, thursday
0000
54°F
N
9 mph
0300
52°F
N
9 mph
0600
52°F
NE
7 mph
0900
50°F
NE
9 mph
1200
57°F
NE
11 mph
1500
54°F
E
9 mph
1800
52°F
E
9 mph
Units of measurement: °C / °F