Current sea water temperature:
+32.7°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 29 | 32.7°F | December 24 | 33.3°F |
| December 28 | 33.4°F | December 23 | 32.4°F |
| December 27 | 33.4°F | December 22 | 33.8°F |
| December 26 | 33.6°F | December 21 | 32.4°F |
| December 25 | 34.5°F | December 20 | 31.1°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
January
January
| Seinajoki |
Best time for vacation in Seinajoki
Seinajoki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Seinajoki
Local time: 16:47
December 29, monday
1800
27°F
S
14 mph
14 mph
2100
25°F
S
14 mph
14 mph
December 30, tuesday
0000
27°F
S
15 mph
15 mph
0300
27°F
S
15 mph
15 mph
0600
25°F
S
14 mph
14 mph
0900
25°F
S
13 mph
13 mph
1200
25°F
S
12 mph
12 mph
1500
23°F
S
11 mph
11 mph
