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Sea Temperature in Naantali in September
© kesKari
Complete information on the sea temperature range in the Gulf of Bothnia in Naantali in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Naantali. 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 Naantali in September
10°C
MINIMUN
14.5°C
AVERAGE
19°C
MAXIMUM
Historical Data of Water Temperature in September in Naantali
Water Temperature Chart for Gulf of Bothnia in Naantali in September
Sea Temperature Table in Naantali in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 14°C | 18°C | 16°C | 16.3°C |
| Sep 2 | 13°C | 18°C | 15°C | 15.5°C |
| Sep 3 | 14°C | 18°C | 16°C | 16.0°C |
| Sep 4 | 14°C | 17°C | 15°C | 15.8°C |
| Sep 5 | 13°C | 17°C | 15°C | 15.3°C |
| Sep 6 | 13°C | 17°C | 14°C | 15.3°C |
| Sep 7 | 13°C | 17°C | 14°C | 15.3°C |
| Sep 8 | 12°C | 17°C | 14°C | 15.0°C |
| Sep 9 | 12°C | 17°C | 14°C | 15.0°C |
| Sep 10 | 13°C | 16°C | 14°C | 14.8°C |
| Sep 11 | 12°C | 16°C | 14°C | 14.5°C |
| Sep 12 | 12°C | 16°C | 14°C | 14.5°C |
| Sep 13 | 12°C | 15°C | 14°C | 14.3°C |
| Sep 14 | 13°C | 15°C | 15°C | 14.8°C |
| Sep 15 | 12°C | 15°C | 14°C | 14.3°C |
| Sep 16 | 13°C | 15°C | 15°C | 14.8°C |
| Sep 17 | 13°C | 15°C | 14°C | 14.3°C |
| Sep 18 | 12°C | 14°C | 14°C | 14.0°C |
| Sep 19 | 12°C | 14°C | 14°C | 14.0°C |
| Sep 20 | 12°C | 14°C | 14°C | 14.0°C |
| Sep 21 | 12°C | 13°C | 14°C | 13.8°C |
| Sep 22 | 11°C | 13°C | 14°C | 13.5°C |
| Sep 23 | 12°C | 13°C | 14°C | 13.5°C |
| Sep 24 | 11°C | 13°C | 14°C | 13.3°C |
| Sep 25 | 11°C | 13°C | 14°C | 13.3°C |
| Sep 26 | 11°C | 13°C | 14°C | 13.3°C |
| Sep 27 | 11°C | 13°C | 13°C | 13.0°C |
| Sep 28 | 11°C | 13°C | 13°C | 13.0°C |
| Sep 29 | 11°C | 13°C | 13°C | 13.0°C |
Naantali Climate and Swimming Opportunities in September
14°C
Average Day Air Temperature
7°C
Average Night Air Temperature
59 mm
Precipitation Amount per Month
11 days
Number of Rainy Days
13 hrs
Daylight
per Day
4 hrs
Sunshine
per Day
16 km/h
Average Wind Speed
83%
Average
humidity
Naantali lies within the Western Finland Province in Finland. The average daytime temperature in Naantali 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 Naantali 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 Naantali in September ranges from 13°C to 16°C (55°F to 61°F). At the beginning of the month, the average temperature is around 16°C (61°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 Naantali for September is 14°C (57°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 Naantali
What is the sea temperature in Naantali in September?
The water temperature in the Gulf of Bothnia in Naantali in September ranges from 13°C to 16°C (55°F to 61°F).
Is it possible to swim in the Gulf of Bothnia in Naantali in September?
The average sea temperature in Naantali in September is 14°C (57°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.