Current sea water temperature:
+30.9°F
| Minimum sea water temperature in March: | 38.1°F |
| Maximum sea water temperature in March: | 28.9°F |
| Average sea water temperature in March: | 32.4°F |
| more information | |
14 days
forecast
forecast
| Helsinki |
monthly
weather
weather
| Helsinki |
Sea water temperature for the last 10 days:
| March 16 | 30.9°F | March 11 | 32.9°F |
| March 15 | 32.0°F | March 10 | 32.7°F |
| March 14 | 32.5°F | March 9 | 31.8°F |
| March 13 | 31.1°F | March 8 | 31.1°F |
| March 12 | 32.0°F | March 7 | 32.0°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
March
March
| Helsinki |
Best time for vacation in Helsinki
Helsinki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Helsinki
Local time: 13:06
March 16, monday
1500
36°F
NW
6 mph
6 mph
1800
34°F
W
7 mph
7 mph
2100
34°F
NW
5 mph
5 mph
March 17, tuesday
0000
34°F
N
5 mph
5 mph
0300
34°F
NE
5 mph
5 mph
0600
34°F
NE
4 mph
4 mph
0900
34°F
NE
6 mph
6 mph
1200
36°F
NE
7 mph
7 mph
