Current Sea Water Temperature:
+65.4°F
| Maximum Sea Water Temperature in July: | 78.6°F |
| Minimum Sea Water Temperature in July: | 51.8°F |
| Average water temperature in July: | 63.3°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| July 30 | 65.4°F | July 25 | 65.6°F |
| July 29 | 65.0°F | July 24 | 66.4°F |
| July 28 | 64.8°F | July 23 | 64.8°F |
| July 27 | 65.6°F | July 22 | 66.0°F |
| July 26 | 65.2°F | July 21 | 67.2°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 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 2026 for Helsinki was 63.9°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 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 |  |
+74 |
| Helsinki |  |
+70 |
| Juvaskyla | |
+74 |
| Kemi | |
+62 |
| Kotka | |
+66 |
| Lahti | |
+74 |
| Lappeenranta | |
+76 |
| Oulu | |
+72 |
| Pori | |
+74 |
| Saariselka | |
+66 |
| Savolinna | |
+72 |
| Seinajoki |  |
+78 |
| Turku | |
+72 |
| Vaasa | |
+74 |
| Vantaa | |
+74 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Helsinki
Local time: 12:52
30 jul, thursday
| 1500 |  |
72°F | NE 9 mph |
| 1800 | |
74°F | NE 9 mph |
| 2100 | |
68°F | NE 6 mph |
31 jul, friday
| 0000 |  |
64°F | N 7 mph |
| 0300 | |
64°F | N 7 mph |
| 0600 | |
64°F | N 8 mph |
| 0900 | |
70°F | N 12 mph |
| 1200 |  |
76°F | N 12 mph |