Current sea water temperature:
+59.9°F
| Minimum sea water temperature in June: | 71.1°F |
| Maximum sea water temperature in June: | 45.0°F |
| Average sea water temperature in June: | 55.0°F |
| more information | |
14 days
forecast
forecast
| Helsinki |
monthly
weather
weather
| Helsinki |
Sea water temperature for the last 10 days:
| June 27 | 59.9°F | June 22 | 58.3°F |
| June 26 | 58.1°F | June 21 | 57.4°F |
| June 25 | 57.0°F | June 20 | 57.9°F |
| June 24 | 58.6°F | June 19 | 56.7°F |
| June 23 | 57.9°F | June 18 | 55.4°F |
Monthly sea water temperature, °F
When is the warmest sea in Helsinki?
Based on the data about daily sea water temperature for the last three years the warmest sea in Helsinki was noticed in August, July and September.
Monthly Sea Temperatures in Helsinki, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.8°F. The highest and lowest sea temperatures during the month were 73.9°F and 56.5°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 63.2°F. The highest and lowest sea temperatures during the month were 74.5°F and 54.0°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 59.5°F. The highest and lowest sea temperatures during the month were 63.3°F and 54.0°F.
current
weather
weather
| Helsinki |
weather in
July
July
| Helsinki |
Best time for vacation in Helsinki
Helsinki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Helsinki
Local time: 06:18
June 28, sunday
0900
64°F
NW
6 mph
6 mph
1200
68°F
N
7 mph
7 mph
1500
72°F
N
6 mph
6 mph
1800
70°F
N
5 mph
5 mph
2100
63°F
NE
8 mph
8 mph
June 29, monday
0000
63°F
NE
5 mph
5 mph
0300
63°F
E
4 mph
4 mph
0600
63°F
S
3 mph
3 mph
