Measurements:
°C
°F
CURRENT WEATHER
01:10
Seinajoki
56°F
N 7 mph
Feels like: 54°F
Precip: 29%
World Resorts Finland Seinajoki Weather

7 Day Weather Forecast

09.09
wed
DAY
54°F
N 6 mph
precip
44%
NIGHT
52°F
S 3 mph
precip
44%
09.10
thu
DAY
58°F
NE 10 mph
precip
31%
NIGHT
48°F
N 8 mph
precip
67%
09.11
fri
DAY
56°F
SE 6 mph
precip
18%
NIGHT
48°F
N 5 mph
precip
31%
09.12
sat
DAY
52°F
E 5 mph
precip
34%
NIGHT
50°F
NE 4 mph
precip
26%
09.13
sun
DAY
58°F
N 3 mph
precip
11%
NIGHT
54°F
SE 4 mph
precip
27%
09.14
mon
DAY
60°F
E 4 mph
precip
4%
NIGHT
44°F
NE 2 mph
precip
31%
09.15
tue
DAY
52°F
NW 5 mph
precip
16%
NIGHT
52°F
SW 4 mph
precip
31%

Seinajoki Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Seinajoki was 13.7°F. The maximum and minimum values were 10.9°F and 16.6°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 72.2 °F
August 68.2 °F
June 67.0 °F
Warmest sea temperature:
August 63.2 °F
July 62.3 °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:
July 5 days
August 5 days
September 3 days
The most windy months:
March 8 mph
December 7 mph
May 7 mph
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