World Resorts Finland Seinajoki Weather

Seinajoki 7 Days Forecast

17.05
sun
Day
59°F
NE 10 mph
Precip.
67%
Night
45°F
N 7 mph
Precip.
0%
18.05
mon
Day
61°F
NE 5 mph
Precip.
0%
Night
50°F
S 5 mph
Precip.
0%
19.05
tue
Day
57°F
W 9 mph
Precip.
0%
Night
55°F
N 3 mph
Precip.
0%
20.05
wed
Day
54°F
NE 9 mph
Precip.
86%
Night
48°F
N 6 mph
Precip.
0%
21.05
thu
Day
64°F
NE 10 mph
Precip.
100%
Night
54°F
N 9 mph
Precip.
0%
22.05
fri
Day
54°F
E 10 mph
Precip.
74%
Night
46°F
E 11 mph
Precip.
0%
23.05
sat
Day
48°F
SE 10 mph
Precip.
66%
Night
45°F
S 4 mph
Precip.
0%

Sea water temperature in May, °F

Show year:
2026
2025
2024

The average sea water temperature in May of 2026 was 43.6°F. The highest and lowest sea temperatures during the month were 46.0°F and 41.2°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

Sunniest months:
May 11 days
July 11 days
June 10 days
Warmest months:
July 70.3 °F
August 66.5 °F
June 65.3 °F
Warmest sea temp:
August 62.0 °F
July 60.9 °F
September 55.8 °F
Coldest months:
January 22.1 °F
February 25.2 °F
December 28.0 °F
Rainiest months:
August 6 days
July 5 days
June 4 days
Windiest months:
March 8.4 mph
December 7.9 mph
May 7.8 mph

Seinajoki on a weather map

Current weather
09:24
Seinajoki
+54°F
N 9 mph
Feels like: +50°F
Precip.: 0%
Places in Finland:
Name
°F
Vaasa
+50°F
Vantaa
+52°F
Imatra
+54°F
Kemi
+48°F
Koli National Park
+50°F
Kotka
+46°F
Lahti
+54°F
Oulu
+46°F
Porvoo
+46°F
Pori
+52°F
Saariselka
+45°F
Turku
+48°F
Helsinki
+50°F
Espoo
+52°F
Juvaskyla
+52°F
all places
24 Hours Forecast
Seinajoki
Local time: 09:24
May 17, sunday
1200
59°F
NE
10 mph
1500
59°F
NE
10 mph
1800
59°F
NE
12 mph
2100
52°F
NE
8 mph
May 18, monday
0000
45°F
N
7 mph
0300
43°F
N
6 mph
0600
43°F
N
6 mph
0900
55°F
NE
6 mph
Units of measurement: °C / °F