Current sea water temperature:
+33.4°F
| Minimum sea water temperature in December: | 38.3°F |
| Maximum sea water temperature in December: | 28.4°F |
| Average sea water temperature in December: | 32.8°F |
| more information | |
14 days
forecast
forecast
| Seinajoki |
monthly
weather
weather
| Seinajoki |
Sea water temperature for the last 10 days:
| December 4 | 33.4°F | November 29 | 37.0°F |
| December 3 | 35.1°F | November 28 | 35.1°F |
| December 2 | 35.4°F | November 27 | 35.6°F |
| December 1 | 36.5°F | November 26 | 36.9°F |
| November 30 | 37.6°F | November 25 | 36.9°F |
Monthly sea water temperature, °F
When is the warmest sea in Seinajoki?
Based on the data about daily sea water temperature for the last three years the warmest sea in Seinajoki was noticed in August, July and September.
Monthly Sea Temperatures in Seinajoki, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.4°F. The highest and lowest sea temperatures during the month were 71.2°F and 58.5°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 65.1°F. The highest and lowest sea temperatures during the month were 74.1°F and 56.7°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.
current
weather
weather
| Seinajoki |
weather in
December
December
| Seinajoki |
Best time for vacation in Seinajoki
Seinajoki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Seinajoki
Local time: 08:46
December 05, friday
0900
37°F
N
5 mph
5 mph
1200
39°F
N
4 mph
4 mph
1500
37°F
NW
2 mph
2 mph
1800
39°F
NW
2 mph
2 mph
2100
39°F
N
3 mph
3 mph
December 06, saturday
0000
39°F
N
4 mph
4 mph
0300
37°F
W
4 mph
4 mph
0600
37°F
W
6 mph
6 mph
