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Sea Temperature in Hanko in September
Complete information on the sea temperature range in the Gulf of Finland in Hanko in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Hanko. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Hanko in September
50°F
MINIMUN
58°F
AVERAGE
66°F
MAXIMUM
Historical Data of Water Temperature in September in Hanko
Water Temperature Chart for Gulf of Finland in Hanko in September
Sea Temperature Table in Hanko in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 61°C | 64°C | 64°C | 63°C |
| Sep 2 | 59°C | 64°C | 64°C | 63°C |
| Sep 3 | 59°C | 64°C | 63°C | 62°C |
| Sep 4 | 59°C | 63°C | 63°C | 62°C |
| Sep 5 | 57°C | 63°C | 63°C | 61°C |
| Sep 6 | 57°C | 63°C | 63°C | 62°C |
| Sep 7 | 59°C | 63°C | 61°C | 61°C |
| Sep 8 | 59°C | 63°C | 61°C | 62°C |
| Sep 9 | 57°C | 63°C | 61°C | 61°C |
| Sep 10 | 57°C | 61°C | 59°C | 60°C |
| Sep 11 | 57°C | 61°C | 59°C | 60°C |
| Sep 12 | 57°C | 59°C | 59°C | 60°C |
| Sep 13 | 57°C | 59°C | 57°C | 59°C |
| Sep 14 | 57°C | 61°C | 57°C | 59°C |
| Sep 15 | 57°C | 59°C | 57°C | 59°C |
| Sep 16 | 57°C | 59°C | 57°C | 59°C |
| Sep 17 | 55°C | 59°C | 55°C | 58°C |
| Sep 18 | 55°C | 59°C | 55°C | 58°C |
| Sep 19 | 55°C | 59°C | 55°C | 58°C |
| Sep 20 | 55°C | 57°C | 54°C | 57°C |
| Sep 21 | 55°C | 57°C | 54°C | 57°C |
| Sep 22 | 55°C | 55°C | 54°C | 56°C |
| Sep 23 | 55°C | 57°C | 52°C | 57°C |
| Sep 24 | 54°C | 55°C | 52°C | 55°C |
| Sep 25 | 54°C | 57°C | 52°C | 56°C |
| Sep 26 | 54°C | 57°C | 52°C | 56°C |
| Sep 27 | 54°C | 57°C | 50°C | 55°C |
| Sep 28 | 54°C | 57°C | 50°C | 55°C |
| Sep 29 | 54°C | 55°C | 50°C | 55°C |
Hanko Climate and Swimming Opportunities in September
57°F
Average Day Air Temperature
45°F
Average Night Air Temperature
2 in
Precipitation Amount per Month
11 days
Number of Rainy Days
13 hrs
Daylight
per Day
4 hrs
Sunshine
per Day
10 mph
Average Wind Speed
83%
Average
humidity
Hanko lies within the Southern Finland Province in Finland. The average daytime temperature in Hanko in September is 14°C (57°F), while the nighttime average is 7°C (45°F). There are typically 11 rainy days during the month, with a total precipitation of 59 mm (2.3 inches). The daylight duration in September in Hanko is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 16 km/h (10 mph), and the humidity level is around 83%.
The water temperature in Hanko in September ranges from 12°C to 17°C (54°F to 63°F). At the beginning of the month, the average temperature is around 17°C (63°F), shifting to 15°C (59°F) by mid-September and reaching 13°C (55°F) in the last ten days. Overall, the average sea temperature in Hanko for September is 15°C (59°F). The water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Hanko
What is the sea temperature in Hanko in September?
The water temperature in the Gulf of Finland in Hanko in September ranges from 12°C to 17°C (54°F to 63°F).
Is it possible to swim in the Gulf of Finland in Hanko in September?
The average sea temperature in Hanko in September is 15°C (59°F), and the air temperature is 14°C (57°F), so the water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.