Current sea water temperature:
+64.9°F
| Minimum sea water temperature in July: | 75.7°F |
| Maximum sea water temperature in July: | 51.6°F |
| Average sea water temperature in July: | 61.9°F |
| more information | |
14 days
forecast
forecast
| Helsinki |
monthly
weather
weather
| Helsinki |
Sea water temperature for the last 10 days:
| July 17 | 64.9°F | July 12 | 61.9°F |
| July 16 | 64.6°F | July 11 | 60.1°F |
| July 15 | 63.1°F | July 10 | 59.5°F |
| July 14 | 62.1°F | July 9 | 58.5°F |
| July 13 | 62.4°F | July 8 | 58.5°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 61.0°F. The highest and lowest sea temperatures during the month were 64.9°F and 58.5°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: 09:20
July 18, saturday
1200
70°F
N
11 mph
11 mph
1500
70°F
NW
9 mph
9 mph
1800
72°F
NW
11 mph
11 mph
2100
66°F
N
11 mph
11 mph
July 19, sunday
0000
64°F
N
22 mph
22 mph
0300
63°F
N
23 mph
23 mph
0600
61°F
NE
25 mph
25 mph
0900
61°F
E
19 mph
19 mph
