Current Sea Water Temperature:
+26.8°F
| Maximum Sea Water Temperature in February: | 35.8°F |
| Minimum Sea Water Temperature in February: | 26.4°F |
| Average water temperature in February: | 30.0°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| February 17 | 26.8°F | February 12 | 27.8°F |
| February 16 | 26.8°F | February 11 | 28.0°F |
| February 15 | 27.0°F | February 10 | 28.4°F |
| February 14 | 27.2°F | February 09 | 26.8°F |
| February 13 | 27.4°F | February 08 | 26.8°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 2025 for Helsinki was 65.3°F. The maximum and minimum values were 57.2°F and 76.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Helsinki was 64.6°F. The maximum and minimum values were 54.4°F and 77.2°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Helsinki was 60.6°F. The maximum and minimum values were 54.4°F and 64.8°F respectively.
Finland Resorts:
NAME
F°
| Espoo |  |
-2 |
| Helsinki | |
+2 |
| Imatra | |
-2 |
| Juvaskyla | |
0 |
| Kemi | |
-2 |
| Lahti | |
-6 |
| Lappeenranta | |
-6 |
| Oulu |  |
+16 |
| Pori |  |
+8 |
| Porvoo | |
+2 |
| Saariselka | |
-20 |
| Seinajoki | |
+12 |
| Turku | |
+2 |
| Vaasa | |
+16 |
| Vantaa | |
-4 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Helsinki
Local time: 19:39
17 feb, tuesday
| 2100 |  |
2°F | NW 3 mph |
18 feb, wednesday
| 0000 | |
2°F | NW 5 mph |
| 0300 | |
2°F | NW 6 mph |
| 0600 | |
0°F | NW 6 mph |
| 0900 |  |
4°F | NW 7 mph |
| 1200 |  |
10°F | NW 9 mph |
| 1500 |  |
10°F | W 9 mph |
| 1800 | |
8°F | W 9 mph |