Current Sea Water Temperature:
+51.4°F
| Maximum Sea Water Temperature in October: | 59.4°F |
| Minimum Sea Water Temperature in October: | 42.2°F |
| Average water temperature in October: | 50.5°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| October 19 | 51.4°F | October 14 | 53.4°F |
| October 18 | 51.6°F | October 13 | 54.2°F |
| October 17 | 52.2°F | October 12 | 54.6°F |
| October 16 | 52.8°F | October 11 | 54.6°F |
| October 15 | 52.8°F | October 10 | 54.2°F |
When is the Warmest Sea for Helsinki?
According to our data for the last three years for Helsinki 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 Helsinki was 61.3°F. The maximum and minimum values were 57.0°F and 66.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Helsinki was 64.0°F. The maximum and minimum values were 59.4°F and 68.8°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2026 for Helsinki was 58.8°F. The maximum and minimum values were 55.0°F and 62.0°F respectively.
Finland Resorts:
NAME
F°
| Espoo |  |
+44 |
| Helsinki | |
+46 |
| Imatra | |
+42 |
| Juvaskyla | |
+40 |
| Kemi |  |
+46 |
| Koli National Park | |
+40 |
| Lahti | |
+42 |
| Lappeenranta | |
+42 |
| Oulu | |
+42 |
| Pori | |
+42 |
| Saariselka | |
+38 |
| Savolinna |  |
+42 |
| Seinajoki | |
+40 |
| Turku | |
+44 |
| Vaasa | |
+46 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Helsinki
Local time: 12:07
19 oct, monday
| 1500 |  |
48°F | N 4 mph |
| 1800 |  |
42°F | N 4 mph |
| 2100 | |
42°F | N 3 mph |
20 oct, tuesday
| 0000 | |
42°F | N 5 mph |
| 0300 | |
40°F | N 4 mph |
| 0600 | |
40°F | NW 4 mph |
| 0900 | |
40°F | NW 6 mph |
| 1200 | |
46°F | NW 7 mph |