December weather forecast
Naantali, Finland

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Weather in December

December welcomes winter in Naantali, Finland. The sea temperature falls dramatically to a brisk 2.1°C (35.8°F), marking the end of the year. The return of long nights and short days create the perfect stage for a white Christmas. The city folds into its winter blanket once again, presenting a picturesque snow-covered landscape. With the arrival of December, Naantali once again prepares for the beautiful frosty season. It's time for warm drinks, fireplaces, and cozy indoor activities to counter the weather's chilly touch.

Sea temperature

In December, the average sea temperature is 2.1°C (35.8°F).
Note: While participating in swimming, this is a serious life-threatening situation. Breathing becomes unmanageable, making lucid thinking almost impossible. The use of a specialized swimsuit is crucial to control thermal loss.

Daylight

December has the shortest days of the year in Naantali, with an average of 5h and 54min of daylight.
On the first day of the month, sunrise is at 09:11 and sunset at 15:30. On the last day of December, sunrise is at 09:38 and sunset at 15:31 EET.
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Frequently asked questions

What is the water temperature in December in Naantali?

In Naantali, in December, the average water temperature is 2.1°C (35.8°F). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

What is the month with the shortest days in Naantali?

The month with the shortest days is December, with an average of 5h and 54min of daylight.

How many hours of daylight does Naantali have in December?

The average day length in December in Naantali is 5h and 53min.

When is the sunrise / sunset in December in Naantali?

On the first day of December in Naantali, sunrise is at 09:11 and sunset at 15:30. On the last day of the month, sunrise is at 09:38 and sunset at 15:31 EET.

Average sea temperature in December
Naantali, Finland

Average sea temperature in December - Naantali, Finland
  • Average sea temperature in December: 2.1°C

The best month for swimming (with the highest average sea temperature) is August (12.8°C).
The coldest month (with the lowest average sea temperature) is February (-0.4°C).

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Average daylight in December
Naantali, Finland

Average daylight in December - Naantali, Finland
  • Average daylight in December: 5h and 5min

The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).

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Naantali, Finland

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