Current Sea Water Temperature:
+61.2°F
| Maximum Sea Water Temperature in August: | 73.6°F |
| Minimum Sea Water Temperature in August: | 46.2°F |
| Average water temperature in August: | 63.2°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| August 19 | 61.2°F | August 14 | 59.0°F |
| August 18 | 60.8°F | August 13 | 61.2°F |
| August 17 | 61.8°F | August 12 | 61.4°F |
| August 16 | 61.6°F | August 11 | 62.6°F |
| August 15 | 60.8°F | August 10 | 62.4°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 2026 for Seinajoki was 61.8°F. The maximum and minimum values were 59.0°F and 63.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Seinajoki was 65.6°F. The maximum and minimum values were 62.6°F and 69.8°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 |  |
+68 |
| Helsinki |  |
+70 |
| Juvaskyla |  |
+58 |
| Kemi | |
+60 |
| Kotka |  |
+64 |
| Lahti | |
+62 |
| Lappeenranta | |
+58 |
| Oulu | |
+58 |
| Pori | |
+62 |
| Saariselka | |
+62 |
| Savolinna | |
+54 |
| Seinajoki | |
+58 |
| Turku | |
+64 |
| Vaasa | |
+60 |
| Vantaa | |
+70 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Seinajoki
Local time: 17:56
19 aug, wednesday
| 1800 |  |
58°F | SE 6 mph |
| 2100 |  |
54°F | SE 4 mph |
20 aug, thursday
| 0000 |  |
50°F | SE 4 mph |
| 0300 | |
48°F | E 4 mph |
| 0600 | |
46°F | E 3 mph |
| 0900 |  |
54°F | NE 2 mph |
| 1200 | |
62°F | E 6 mph |
| 1500 | |
64°F | NE 6 mph |