Measurements:
°C
°F
CURRENT WEATHER
14:02
Seinajoki
58°F
SE 6 mph
Feels like: 58°F
Precip: 0%
World Resorts Finland Seinajoki Weather

7 Day Weather Forecast

04.21
tue
DAY
52°F
S 6 mph
precip
0%
NIGHT
42°F
E 6 mph
precip
0%
04.22
wed
DAY
50°F
S 11 mph
precip
0%
NIGHT
32°F
S 11 mph
precip
0%
04.23
thu
DAY
38°F
S 15 mph
precip
0%
NIGHT
34°F
S 6 mph
precip
0%
04.24
fri
DAY
46°F
S 7 mph
precip
0%
NIGHT
38°F
S 4 mph
precip
70%
04.25
sat
DAY
40°F
SW 10 mph
precip
0%
NIGHT
26°F
S 5 mph
precip
0%
04.26
sun
DAY
34°F
S 12 mph
precip
0%
NIGHT
22°F
SE 4 mph
precip
0%
04.27
mon
DAY
42°F
E 6 mph
precip
0%
NIGHT
28°F
NE 5 mph
precip
0%

Seinajoki Sea Water Temperature in April, °F

Select Year: 2026 2025 2024

The average sea surface temperature in April 2026 for Seinajoki was 2.7°F. The maximum and minimum values were -0.4°F and 6.7°F respectively.

Seinajoki on the Weather Map

Best Time to Visit Seinajoki
The most sunny months:
May 11 days
July 11 days
June 10 days
The most warm months:
July 72.5 °F
August 68.4 °F
June 66.9 °F
Warmest sea temperature:
August 63.3 °F
July 62.1 °F
September 56.4 °F
The most cold months:
January 19.0 °F
February 22.4 °F
December 25.6 °F
The most rainy months:
August 6 days
July 5 days
June 4 days
The most windy months:
March 8 mph
December 7 mph
May 7 mph
more details