Current Sea Water Temperature:
+31.6°F
| Maximum Sea Water Temperature in December: | 37.0°F |
| Minimum Sea Water Temperature in December: | 26.0°F |
| Average water temperature in December: | 30.9°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 04 | 31.6°F | November 29 | 35.6°F |
| December 03 | 33.4°F | November 28 | 33.4°F |
| December 02 | 33.8°F | November 27 | 34.0°F |
| December 01 | 35.0°F | November 26 | 35.4°F |
| November 30 | 36.2°F | November 25 | 35.4°F |
When is the Warmest Sea for Seinajoki?
According to our data for the last three years for Seinajoki the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Seinajoki was 64.8°F. The maximum and minimum values were 59.4°F and 73.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Seinajoki was 66.8°F. The maximum and minimum values were 57.4°F and 76.8°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Seinajoki was 57.4°F. The maximum and minimum values were 51.8°F and 63.2°F respectively.
Finland Resorts:
NAME
F°
| Espoo |  |
+38 |
| Helsinki | |
+38 |
| Juvaskyla |  |
+34 |
| Kemi |  |
+30 |
| Koli National Park | |
+32 |
| Kotka | |
+38 |
| Lahti | |
+36 |
| Lappeenranta | |
+36 |
| Oulu |  |
+34 |
| Pori | |
+38 |
| Saariselka | |
+14 |
| Savolinna | |
+34 |
| Turku | |
+40 |
| Vaasa | |
+38 |
| Vantaa | |
+38 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Seinajoki
Local time: 09:07
05 dec, friday
| 1200 |  |
38°F | N 4 mph |
| 1500 |  |
36°F | NW 2 mph |
| 1800 | |
38°F | NW 2 mph |
| 2100 | |
38°F | N 3 mph |
06 dec, saturday
| 0000 | |
38°F | N 4 mph |
| 0300 | |
36°F | W 4 mph |
| 0600 | |
36°F | W 6 mph |
| 0900 | |
36°F | W 7 mph |